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Toward high-resolution and
timely diagnosis for measles
Ian Carter
Principal Hospital Scientist NSW Health Pathology
ICPMR Westmead Hospital
South Australian Chronicle and Weekly Mail (Adelaide SA
1868 - 1881) MEASLES IN PIGS
Pork measles is caused by tapeworm parasites that live
in the muscles of pigs (Cysticercus bovis)
The pig is not usually affected but can be in pain and
battle to move around When people eat undercooked
pork infected by tapeworm cysts tapeworms develop in
their intestines and make them very sick
Pigs cannot be treated for this disease but preventive
measures can be taken by practising good hygiene and
stopping them from wandering about where they eat
human faeces
Measles - Paramyxoviridae
Measles is an infection of the respiratory system caused
by a virus specifically a Paramyxovirus of the genus
Morbillivirus Morbilliviruses like other paramyxovirus are
enveloped single-stranded negative-sense RNA viruses
Measles is spread through contact with fluids from an
infected persons nose and mouth either directly or
through aerosol transmission and is highly infectious
The infection has an average incubation period of 14
days (range 6-19 days) and infectivity lasts from 2-4 days
prior to 2-5 days following the onset of the rash
The measles virus is a spherical non segmented single-stranded RNA virus in the Morbillivirus family closely related to the rinderpest and canine distemper viruses
It contains six structural proteins three that are complexed to the RNA and three that are associated with the viral membrane envelope
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
South Australian Chronicle and Weekly Mail (Adelaide SA
1868 - 1881) MEASLES IN PIGS
Pork measles is caused by tapeworm parasites that live
in the muscles of pigs (Cysticercus bovis)
The pig is not usually affected but can be in pain and
battle to move around When people eat undercooked
pork infected by tapeworm cysts tapeworms develop in
their intestines and make them very sick
Pigs cannot be treated for this disease but preventive
measures can be taken by practising good hygiene and
stopping them from wandering about where they eat
human faeces
Measles - Paramyxoviridae
Measles is an infection of the respiratory system caused
by a virus specifically a Paramyxovirus of the genus
Morbillivirus Morbilliviruses like other paramyxovirus are
enveloped single-stranded negative-sense RNA viruses
Measles is spread through contact with fluids from an
infected persons nose and mouth either directly or
through aerosol transmission and is highly infectious
The infection has an average incubation period of 14
days (range 6-19 days) and infectivity lasts from 2-4 days
prior to 2-5 days following the onset of the rash
The measles virus is a spherical non segmented single-stranded RNA virus in the Morbillivirus family closely related to the rinderpest and canine distemper viruses
It contains six structural proteins three that are complexed to the RNA and three that are associated with the viral membrane envelope
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Pork measles is caused by tapeworm parasites that live
in the muscles of pigs (Cysticercus bovis)
The pig is not usually affected but can be in pain and
battle to move around When people eat undercooked
pork infected by tapeworm cysts tapeworms develop in
their intestines and make them very sick
Pigs cannot be treated for this disease but preventive
measures can be taken by practising good hygiene and
stopping them from wandering about where they eat
human faeces
Measles - Paramyxoviridae
Measles is an infection of the respiratory system caused
by a virus specifically a Paramyxovirus of the genus
Morbillivirus Morbilliviruses like other paramyxovirus are
enveloped single-stranded negative-sense RNA viruses
Measles is spread through contact with fluids from an
infected persons nose and mouth either directly or
through aerosol transmission and is highly infectious
The infection has an average incubation period of 14
days (range 6-19 days) and infectivity lasts from 2-4 days
prior to 2-5 days following the onset of the rash
The measles virus is a spherical non segmented single-stranded RNA virus in the Morbillivirus family closely related to the rinderpest and canine distemper viruses
It contains six structural proteins three that are complexed to the RNA and three that are associated with the viral membrane envelope
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Measles - Paramyxoviridae
Measles is an infection of the respiratory system caused
by a virus specifically a Paramyxovirus of the genus
Morbillivirus Morbilliviruses like other paramyxovirus are
enveloped single-stranded negative-sense RNA viruses
Measles is spread through contact with fluids from an
infected persons nose and mouth either directly or
through aerosol transmission and is highly infectious
The infection has an average incubation period of 14
days (range 6-19 days) and infectivity lasts from 2-4 days
prior to 2-5 days following the onset of the rash
The measles virus is a spherical non segmented single-stranded RNA virus in the Morbillivirus family closely related to the rinderpest and canine distemper viruses
It contains six structural proteins three that are complexed to the RNA and three that are associated with the viral membrane envelope
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
The measles virus is a spherical non segmented single-stranded RNA virus in the Morbillivirus family closely related to the rinderpest and canine distemper viruses
It contains six structural proteins three that are complexed to the RNA and three that are associated with the viral membrane envelope
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
History
References to measles ndash as early as 7th century
Measles infection was distinguished from smallpox as
early as the 9th century by an Arab physician by the
name of Abu Becr Razi (the Doctor of Baghdad)
Described by the Persian physician Rhazes in the 10th
century as ldquomore dreaded than smallpoxrdquo
Measles was first mentioned as a childhood disease in
1224
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
The Danish physician Peter Panum is generally given credit
for illuminating the basic principles of measles infection and
epidemiology during his trip to the Faroe Islands in 1846
during a measles epidemic
1954 - Enders and Peebles first isolated the virus in human
and monkey kidney tissue culture
Estimated to have killed about 200 million worldwide in the
last 150 years
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Diagnosis of Measles
Most cases of Measles are diagnosed clinically
usually in patientrsquos home or in General Practice
Direct Virological confirmation is difficult in most
of the Developing countries
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
How is measles diagnosedYour doctor will usually be able to diagnose measles from the
combination of your symptoms especially the characteristic rash
and the small Koplik spots inside your mouth
However a simple throat swab urine or blood test is usually done
to confirm the diagnosis
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Diagnosis with Immunofluorescence
Direct and indirect immunofluorescence have
been used extensively to demonstrate MV
antigens in cells from NPS specimens Urine
was not as successful a specimen for IF
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Diagnosis by Viral Isolation
Measles virus can be isolated form a variety of sources eg throat or conjunctival washings sputum urinary sediment cells and lymphocytes
Primary human kidney (HEK) cells are the best although primary monkey kidney can be used as well Continuous cell lines such as Vero cells can also be used
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Diagnosis by Serology
Diagnosis of measles infection can be made if the antibody titres rise by 4 fold between the acute and the convalescent phase or if measles-specific IgM is found The methods that can be used include IF HAI CF EIA
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Has been a great leap forward diagnostically
non-specific fluorescence issues-no problem
Rapid easy and is now multiplexed
The PCR and sequencing target is the
nucleoprotein gene
Molecular Detection of Measles
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Started at ICPMR on the SmartCycler real-time platform
Graduated to the LC480 platform of Roche
Graduated to the BD Max platform ndash 247 in GMU core
Then graduated to the BD Max platform for simultaneous
detection of measles virus and if it is a vaccine related
strain as well as a human gene for sample adequacy
hence multiplexed with different probe labels
Molecular Detection- NAT or NAD
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
bull Incorporating locked nucleic acid LNA into the PCR
probe increases thermal duplex stability and
improves the specificity of probe hybridization to its
target sequence This reduces background
fluorescence from spurious binding which increases
the signal-to-noise ratio
bull This increase in hybridization creates a significant
broadening in the scope of assay conditions and
allows for more successful multiplexing
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Target - Nucleoprotein gene
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Negative sample
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
QAP
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Pathology 2018 Jun50(4)450-454 doi
101016jpathol201711093 Epub 2018 May 8
Simultaneous co-detection of wild-type
and vaccine strain measles virus using
the BD MAX system
Thapa K1 Ellem JA1 Basile K2 Carter I1 Olma T1 Chen
SC3 Dwyer DE3 Kok J3
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
The WHO Measles and Rubella Laboratory Network
(LabNet) supports genetic characterization of circulating
wild-type viruses throughout the world
Genetic characterization of MeVs is based on sequence
analysis of the 450 nucleotides coding for the 150 amino
acids at the carboxyl terminus of the nucleoprotein (N-450)
The entire N-450 sequence is required for determination of
the genotype and there is up to 12 nucleotide variation
between genotypes
Based on these sequences 24 genotypes have been
identified
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
2017-2018 Number
Genotype A = vaccine 29
Genotype D8 19
Genotype B3 2
Genotype D9 2
WESTMEAD RESULTS
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
10 DETECTED A Measles vaccine strain (genotype A) Throat no hx
10 DETECTED A Measles virus genotype A Comb NoseThroat morbilliform rash
09 DETECTED A Measles virus genotype A (vaccine strain) Throat rash on face and body
15 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Nasal conjunctivitis face rash
12 DETECTED A Throat vaccination 257
409 DETECTED A Throat recent immunisations
409 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine recent immunisations
10 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Urine post mmr with blotchy rash
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Comb NoseThroat no hx
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
12 DETECTED AMeasles virus vaccine strain (genotype A) detected by PCR Further genotyping by sequencing not required Source NOT spec maculopapular rash face and torso
10 DETECTED A Throat 13 days post vaccination Fever for 2 days
10 Positive A Measles vaccine genotype NoseThroat high temp generalised rash irritability
11 Positive A Measles vaccine genotype Throat rash appearing 5 days after rash and temp
10 Positive A Measles vaccine genotype Nasalrash to torso and face Blanches with pressuremeasles
21 Positive A Measles vaccine genotype NoseThroat viral rash measles
10 Positive A Measles vaccine genotype NoseThroat no hx
11 Positive A Measles vaccine genotype NoseThroatcoryzal symptoms and rash since yesterday measles
AGE SYMPTOMS
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Subacute sclerosing panencephalitis (SSPE) is a
rare and chronic form of progressive brain inflammation
caused by a persistent infection with measles virus
Although SSPE is a rare condition there is still a
relatively high incidence in Asia and the Middle East
However the number of reported cases is declining
since the introduction of the measles vaccine -
eradication of the measles virus prevents the SSPE
mutation and therefore the progression of the disease
or even the initial infection itself
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Diagnosis of SSPE
The presence of measles specific antibodies in the CSF is the most reliable means of laboratory diagnosis of SSPE
SSPE is not as common as 30 years ago where at every conference there was a specific session just for this ndash the result of vaccination
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school
Is measles infectious
Yes - it is very infectious It is passed on by coughing
and sneezing the virus into the air It takes between 7
and 18 days (most commonly 10-12 days) to develop
symptoms after being infected (This is the incubation
period) You are infectious and can pass it on to
others from four days before to four days after the
onset of the rash Therefore children with measles
should not mix with others and should stay off school