PowerPoint Presentation
Sharmaine Villamor1
Definitions:Zoonosis: disease of animals transmissible to humans
under natural conditionsInfluenza: an acute viral infection of the
respiratory tract, occurring in isolated cases, epidemics, and
pandemics, caused by Influenzavirus A, B or C (AKA The
Flu)Pandemic: A widespread epidemic of a disease Epidemic:
Occurring suddenly in numbers clearly in excess of normal.
Sharmaine Villamor2
Zoonotic Influenza Pictures
Sharmaine Villamor3
How does this virus work?
RNA Virus (smaller than a cell)
Has no cell wall
Invades other cells
Alters the infected cell and its DNA
Sharmaine Villamor4
Influenza A is made of 8 parts, called segments
Those 8 segments are used to make 10 larger components called
gene productsThese determine certain aspects of the virus Include
products called Hemagglutinin and Neuraminidase, or HA and NA for
short.Commonly recognized in the name of the strain of the virus,
such as H1N1
Sharmaine Villamor5
Control how this virus interacts with the host cell
HA: How well the virus gets along with the host cell1Friend or
foe: Do I know you?Come on in, make yourself at home
NA: How well the children of the virus can detach from the
inside of the host cell to spread to other cellsAllows the children
to leave the nestChildren move in with someone else, start their
own families
Why we classify the strain by the H and N variations.
HA and NA?Sharmaine Villamor6
Hey, look, its a party! (The door is openwith the right HA
key)Mix with your friendsDecide to stay (Hey, why not, the food is
free, and the party never stops?)Start talking to the other DNA
segmentsSpread some urban myths
How about a little Antigenic Drift?Have children, (slow random
genetic changes)Kick the kids out when theyre old enough
(replication)
What happens next?Sharmaine Villamor7
RabiesLyme DiseaseMosquito-borne DiseaseAnimals in Public
SettingsFood-borne DiseaseAvian Influenza
Sharmaine Villamor8Common Zoonotic Disease Question Areas
Sharmaine Villamor9
null92520.0
