Monday, June 24, 2019
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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.

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.

Dead Bird Reporting Hotline