West Nile Virus (WNV)
West Nile Virus (WNV) has spread rapidly across North America, affecting thousands of birds, horses and humans, since it was discovered in the Western hemisphere. WNV swept from the New York City region in 1999 to almost all of the continental U.S., 7 Canadian provinces, and throughout Mexico and parts of the Caribbean by 2004.
The U.S. Geological Survey is committed to understanding the effects of WNV and answering questions that surround this disease. USGS scientists are collaborating with other agencies to learn more about the ecology of WNV. The ways WNV is affecting wildlife populations, particularly wild birds, is not clearly understood. The NWHC is working on various research studies to investigate WNV in wild birds.
Read more about USGS contributions to public health.
Read more about the National Wildlife Health Center's West Nile Virus research projects.
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What is West Nile Virus?
West Nile is an insect-borne flavivirus commonly found in Africa, western Asia
and the Middle East, and never reported in the Western Hemisphere before 1999. It has
been detected in at least 48 species of mosquitoes, over 250 species of birds, and at
least 18 mammalian species, including humans. A good way to help prevent WNV infection
in humans is to avoid mosquito bites - check the CDC guidelines at the
CDC West Nile Virus page
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Other WNV resources:
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USGS West Nile Virus Fact Sheets
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U.S. Department of the Interior | U.S. Geological Survey
