West Nile Virus
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.
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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.
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2009
WI Summary Data
Positive WNV Cases
Updated October 29, 2009
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Avian (bird)
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6
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Equine (horse)
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1
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Human Confirmed
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1
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Human Probable
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0
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Counties Reporting WNV Activity
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8
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For county data go to
the
Surveillance Map |
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Dead Bird
Reporting
Hotline
800-433-1610 |
For information regarding
West Nile virus in WI contact
Diep
Hoang Johnson
608-267-9000 |
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WNV Home | Fact Sheet | Overview |
Surveillance
Resources
Last Revised: October 29, 2009
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