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West Nile Virus Surveillance
West Nile Virus (WNV) is a mosquito-borne virus that can cause encephalitis (an inflammation of the brain) or meningitis (inflammation of the lining of the brain and spinal cord) in humans and other animals. Since the virus cycles in nature between birds and mosquitoes, Wisconsin State and county health officials test certain species of birds to assess the presence of WNV in the area.  Although very few mosquitoes actually carry WNV, infected birds serve as an early warning that the virus is present in the area and that people should be more vigilant in protecting themselves against mosquito bites. 

See resources below to take steps to reduce your risk.


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