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St. Louis Encephalitis

St. Louis encephalitis is an illness spread by the bite of an infected mosquito. The type of mosquitoes that spread St. Louis encephalitis can be found in every county in Wisconsin. Not all mosquito bites will make you sick, but it is still important to take steps to protect yourself and your family while enjoying time outdoors. St. Louis encephalitis is preventable.

Information about St. Louis encephalitis, including information on signs and symptoms, treatment, and resources.

St. Louis encephalitis data.


Reporting, surveillance, and diagnosis information for local health departments and health care providers on St. Louis encephalitis.

Tips to prevent mosquito bites.

Questions about illnesses spread by mosquitoes? Contact us!
Phone: 608javascript:void(0);-267-9003 | Fax: 608-261-4976

Last revised June 15, 2022