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Mosquito Life Cycle
and West Nile virus
transmission
The virus reproduces,
moves to the mosquito’s
salivary glands.
4
When an infected mosquito
bites an uninfected bird,
it injects saliva and
the virus into the bird.
The bird is now infected.
3
Mosquito bites an infected bird, injects
saliva, ingests blood and the virus.
The mosquito is now infected.
2
Adult female mosquitoes suck blood.
6
When an infected mosquito
bites an uninfected human,
it injects saliva and the virus
into the human.
The human is now infected.
1
Young mosquitoes live in water.
5
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