West Nile Virus
West Nile virus is an illness spread by mosquitoes. The type of mosquitoes that spread West Nile virus, Culex species mosquitoes, 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.
West Nile virus is preventable. Learn more about Mosquito Bite Prevention.
Read about Symptoms, Diagnosis, and Treatment from the CDC (Centers for Disease Control and Prevention).
About West Nile Virus
Learn more about West Nile virus, including signs and symptoms, treatment, and resources.
Data
Maps and charts with West Nile virus data.
Reporting and Surveillance
Local or Tribal health departments and health care providers can learn about disease reporting, testing, treatment, and more.
Mosquito Bite Prevention
Tips to prevent mosquito bites.
Contact us
Questions about illnesses spread by mosquitoes? We’re here to help.
Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976