The Sconi

The Wisconsin Department of Health Services (DHS) has confirmed two deaths and one hospitalization due to West Nile virus (WNV) illness, marking the first such fatalities in the state this year. The initial three human cases were reported in residents of Outagamie, Fond du Lac, and Brown counties. Additionally, WNV has been detected in mosquitoes, animals, and healthy blood donors whose blood screened positive for the virus.

"DHS is saddened to hear about the deaths of Wisconsin residents from West Nile Virus," said Traci DeSalvo, DHS Bureau of Communicable Diseases Director. "Although people with weakened immune systems tend to be at greatest risk, severe West Nile virus can occur in people of all ages. It is important for all Wisconsinites to take steps to prevent mosquito bites when outdoors."

West Nile virus is transmitted through the bite of an infected mosquito that has fed on infected birds. The virus does not spread directly from person to person, animal to animal, or animal to person.

On average, 18 cases of WNV illness are reported annually among Wisconsin residents. Transmission can occur any time mosquitoes are active; however, most infections are reported in August or September.

Most individuals infected with WNV do not exhibit symptoms. Those who become ill may experience fever, chills, headache, muscle ache, rash, and fatigue. Severe cases can involve high fever, muscle weakness, stiff neck, disorientation, mental confusion, tremors, paralysis, seizure, and coma. Older adults and those with compromised immune systems are at greater risk for severe illness that can be fatal. Individuals suspecting they have WNV should contact a healthcare provider.

To avoid mosquito-borne illnesses like WNV during summer and fall until a hard frost occurs (temperature below 28 degrees Fahrenheit for at least four straight hours), DHS recommends reducing exposure to mosquitoes and eliminating breeding sites.

Further information on preventing mosquito bites is available on the DHS website.