West Nile Virus - 7 of 10

West Nile Virus FAQs - 10 Found

There have been many reports of new mammalian species infected with West Nile Virus (WNV) this season, such as goats, reindeer, a wolf, and dogs. Has the virus changed?

It is possible that there may have been a mutation in the virus that is causing a higher number of species to be affected this year. There is currently no evidence of significant mutation in the U.S. strain of WNV since its discovery in 1999, but many studies are still underway.

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Maps of West Nile Virus

Tags: Viruses, Animals, Wildlife, Birds, Contamination, Disease, Health