West Nile Virus
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Annual WI Summary Data
Positive WNV Cases
Updated April 30, 2012
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Avian (bird)
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0
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Equine (horse)
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0
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Mosquito pools
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0
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Human Confirmed
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0
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Counties Reporting WNV Activity
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0
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For county data go to the Surveillance
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West Nile virus (WNV), which has been widespread in Africa, southern
Europe, the Middle East and western Asia, first appeared in the New York
City area of the United States in 1999. The disease spread west quickly
and was found in Wisconsin for the first time in 2001 in infected wild
birds. The first human cases of disease from WNV in Wisconsin
appeared in 2002.
WNV is an arbovirus (arthropod-borne virus) transmitted to birds and
mammals by the bite of an infected mosquito.
Few mosquitoes actually carry
the virus. In nature, the virus cycles between birds and mosquitoes but
can infect humans and domestic animals, such as horses.
General information
West
Nile virus fact sheet (PDF, 139 KB) Hmong
(PDF, 26 KB) Spanish
(PDF, 21 KB)
Dead Bird Reporting Hotline
800-433-1610
Contact Wisconsin
Local Public Health Department or Tribal Agency for more information
Diep Hoang
Johnson, Vectorborne Disease Epidemiologist
WI Division of Public Health
Bureau of Communicable Diseases and Emergency Response
(Phone 608-267-0249) (Fax 608-261-4976)
WNV Home | Overview |
Surveillance | Resources
Last Revised: April 30, 2012
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