AR-News: (US CO) West Nile sickens animals in different ways

[Animalara2003 at aol.com]

Nadine Lober
April 5, 2004



West Nile virus emerged in North America in 1999. Historically, this virus 
spanned Africa, the Middle East and much of India and Australia.

West Nile virus was traditionally associated with mild fevers in people and 
was not a pathogen of major concern. But the West Nile virus strain now causing 
illness in the U.S. has killed birds, horses and people.

The virus is perpetuated in a bird-mosquito cycle, in which infected 
mosquitos transmit the virus to birds, which develop a blood virus capable of 
infecting feeding mosquitos.

Studies show that infected mosquitoes transmit the virus while feeding on 
people and animals as well as when they are eaten by certain birds.





full story:

http://www.vaildaily.com/apps/pbcs.dll/article?AID=/20040405/NEWS/104050003 
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