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Expert’s Viewpoint:
Epidemiological Profile of
Waterborne Diseases in Uganda
and Ministry of Health’s
Response & Preparedness
By
Dr. Alex Opio
Co-Director PHFP
Presentation Plan
• Introduction
• Some key definitions
• Epidemiological Profile of Waterborne
Diseases in Uganda
• Ministry of Health’s Response &
Preparedness
– Using Cholera experiences for illustration
• Conclusion
• A water-borne disease or infection is one that
people can catch from infected water.
• Disease transmission is achieved through
drinking contaminated water.
• Infection commonly results during drinking, in
the preparation of food, or the consumption of
food that is infected.
• Waterborne diseases are caused by pathogenic
microorganisms that most commonly are
transmitted in contaminated fresh water.
Background & Introduction
• Waterborne diseases: Diseases that are transmitted through drinking water. The interruption of transmission is achieved by proper treatment of drinking water.
• Water-washed (water-scarce) diseases: Diseases where the interruption of the transmission is achieved through proper attention to effective sanitation, washing and personal hygiene..
• Water based diseases: Diseases transmitted by contact with water, e.g. recreational swimming.
• Water vector diseases: Diseases that are transmitted by a vector, such as the mosquito, which needs water or moisture in order to breed.
Water related diseases: 4 types
relating to the path of transmission
Epidemiological Profile
of Waterborne Diseases
• Bacteria: Cholera, Campylobacter, Typhoid,
Shigellosis, etc.
• Protozoa: Cryptosporidium, Giardia,
Toxoplasma, Amoebiasis, Cyclospora, etc.
• Virus: Adenovirus, Hepatitis E, Rotavirus,
Astrovirus, Enterovirus, etc.
Examples of Causative Organisms of
Waterborne Diseases
Disease Burden
• WHO estimates that every year more than 3.4
million people die as a result of water-related
diseases, making it the leading cause of disease
and death around the world.
• Most of the victims are young children, the vast
majority of whom die of illnesses caused by
organisms that thrive in water sources
contaminated by raw sewage.
• The numbers tend to be a gross underestimation
due to the weak surveillance system
Burden of Cholera
• Globally: Estimated that 2.9 million cholera
cases and 95,000 deaths occur annually in 69
endemic countries, Most are in sub-Saharan
Africa
• In Uganda: Estimated that about 89,000
cases and 3,000 deaths occur annually.
Source: Mohamed et al, June 4, 2015 Plos NTD
• A number of waterborne disease outbreaks have
been reported in Uganda over the last 2 decades
• The main outbreaks involved Cholera, Typhoid
and Hepatitis E. Will share some data (HMIS)
• The outbreaks have occurred in different parts of
the country, in general population and special foci
• The main underlying factors to the outbreaks have
been inadequate access to safe water, water
contamination and poor safe disposal of fecal
matter (poor sanitation)
Outbreaks in Uganda
Epidemic curve HEV outbreak in Napak
District 2013/2014 – N=1,113 Deaths = 26
25 of 26 deaths were pregnant women
Date of illness onset
Nu
mb
er o
f ca
ses
Epidemic curve of suspect Typhoid cases, based
on onset date: Kampala, 1 Jan – 4 Apr, 2015*
*Only those with known date
of onset were plotted here
Cases in this area
may not yet be identified
0
100
200
300
400
500
600
1/1/2015 1/19/2015 2/4/2015 2/18/2015 3/4/2015 3/18/2015 4/1/2015
Death
of
index
patient
Start of
investigation
Cases in this area may
have not be identified
yet
Jan Feb Mar
Risk factors for Waterborne Diseases
Contaminated Water
Inadequate Water
Risk factors for Waterborne Diseases
Cholera Outbreaks
• The first Cholera outbreak was reported in
1971, in Kampala City.
• In the 70s-80s, Uganda registered sporadic
small outbreaks which always got controlled.
• In the 90s, the outbreaks became more
frequent reaching the peak in 1997/98 .
Kampala City was seriously affected with
>5,000 reported cases.
• In the 2000s, outbreaks were reported
regularly in 15-30 districts
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
19
71
19
74
19
77
19
80
19
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19
86
19
89
19
92
19
95
19
98
20
01
20
04
20
07
20
10
20
13
Cases
Cholera cases in Uganda 1971-2014
Reported cholera cases, 2000-2015
0
1000
2000
3000
4000
5000
6000
7000
Cas
es
IDPs in N.UG
Suspected Cholera Cases & Bloody Diarrhea, 2001-2014
0
200
400
600
800
1000
1200
1400
1600
1800
Jan Feb Mar Apr May Jun Jul Aug Sep oct Nov Dec
2010 2011 2012 2013 2014
Monthly cholera cases, 2010-2014
Cholera Hot-spots in Uganda
DRC
South Sudan
Kenya
DRC
Kenya
Major Risk Factors for Cholera Outbreaks
• Influx of refugees from Sudan, DRC and
recently Burundi
• Floods especially leading to contamination of
water sources
• Inadequate provision of safe water
• Poor sanitation
• Population displacement for 2004-2006 cholera
outbreaks in N. Uganda was due IDP camps
• Low education level.
• Poverty
Ministry of Health’s
Response &
Preparedness
MOH’s Response & Preparedness
• The National Preparedness and Response is
conducted within the broader National
Epidemic Preparedness and Response
• In essence, the above consists of Health
System Preparedness to respond
• The interruption of transmission is achieved by
proper treatment of drinking water.
• In this presentation, will use the Cholera
experiences to illustrate some points
MOH’s Response & Preparedness - 1
• Coordination of EPR
– National level EPR Coordination Structures (NTF)
to provided leadership with Sub-Committees
– District level EPR Coordination Structures (DTF) to
provide leadership at that level
– Community level structures
• Epidemiological Surveillance
– Routine surveillance, Reporting, Sample collection
and analysis, Case finding, Contact tracing and Data
– IHR 2005 (Detect, Assess, Report and Respond)
– Global Health Security Agenda
MOH’s Response & Preparedness - 2
• Information Management and EOC
– Coordination center activated during emergencies, and an
incident team constituted.
– IHR notification to WHO is done immediately after
confirmation
– Daily situation report (Sitrep). Sitreps shared with Districts,
National leaders, in-country partners, and WHO
– Monitoring the response
• Laboratory System
– With a strong laboratory system. Different levels of health
care delivery have different lab capacity.
– CPHL acts as a coordinating body for specimen
transportation
National Specimen Transport Network
• A network of lab hubs with enhanced capacity to analyze and monitor
disease trends (77 hubs reaching over 2400 HFs). Each hub headed by a
hub coordinator.
27
x x
x x Monday
Route
x
x
x
x
x Tuesday Route
x
CPHL UVRI
HU
B
• Each hub with a motorbike and a bike rider, who visits 20-30 HFs
within 30-40km radius, bringing samples and delivering results
weekly.
• The hub refers well-packaged using the Posta bus.
UVRI
MOH’s Response & Preparedness - 3
• Case Management
– Treatment centres set up in health facilities close to
the affected communities to minimize transfer of
patients.
• Logistics and Security
– Stockpiling health commodities and supplies ahead
of predicted outbreaks such as pre-El Nino period
– A strong PPP exists to rally the required support
• Human resource development
– Training of Field Epidemiologists (PHFP)
MOH’s Response & Preparedness - 4
• Social Mobilization
– Capacity for development and dissemination
of messages
– Effort is made to understand the knowledge,
attitudes and beliefs of the affected people
– Community mobilization by leaders
– Updates given to the media
Responses explaining Cholera trend
• There has been steady improvement in key indicators namely
– Water and sanitation
– Capacity for early detection and response – IDSR, RRT at
district level, mobile communication vs radio call.
– Contingency planning for disasters eg El Nino starts early
assessments followed by monitoring of evolution
– IDP Camps in northern Uganda were dismantled,
Sudanese refugees return home
– Drainage in Kampala – Nakivubo channel was widened
controlling the floods which used to disturb Kaleerwe,
Bwaise etc; last cholera outbreak in Kampala was in 2008.
The current outbreak is much small and restricted to
localized areas
Existing low cost technologies that
can save lives today
1. Chlorination: Adding chlorine in liquid or tablet form to drinking
water stored in a protected container
2. Solar disinfection: Exposing water in clear plastic bottles to
sunlight for six hours e.g. on the roof of the house
3. Filtration: Water filtration is another way to purify water
4. Combined flocculation/disinfection systems: Adding powders or
tablets to coagulate and flocculate sediments in water followed by a
timed release of chlorine.
5. Boiling: Households can disinfect their drinking water by bringing it
to a rolling boil, which will kill pathogens
6. Safe Storage:
7. Practice of personal hygiene: Hand washing is essential in limiting
the spread of waterborne diseases.
Major Challenges
• Inadequate access to safe water
• Poverty especially in the urban slums
associated with poor living conditions
• Weak data management
– Incomplete data, Underreporting, etc
• Inadequate funding; EPR is resource
intensive
• Inadequate human resource
• Uganda has continued to report waterborne
disease outbreaks, including cholera outbreaks.
• The major risk factors are poor sanitation,
inadequate safe water, adverse weather
conditions (El Nino), etc.
• Although a multi-sectoral approach has been
used to respond, a lot still needs to be done.
• The ongoing efforts need to be consolidated so
as to reduce the frequency of outbreaks.
Conclusion
Acknowledgement
• Dr, Godfrey Bwire
• PHFP
• FETP Fellows
• Dr. Immaculate Nabukeera
• Resource Centre, Ministry of Health
• Conference Organizers