The Clay County Health Department has confirmed the county’s second West Nile virus-positive mosquito sample of the 2026 season.
Health officials said the positive sample was collected in Clay City on Wednesday and confirmed through routine testing.
The positive mosquito sample indicates West Nile virus is circulating in the community and that there is an increased risk of human infection. Residents are being encouraged to follow the “three R’s” — reduce exposure to mosquitoes, repel mosquitoes by using insect repellent and report areas where mosquitoes may be breeding.
West Nile virus is transmitted to humans through the bite of an infected mosquito. Mosquitoes acquire the virus by feeding on infected birds, and the illness is not spread from person to person.
Most people infected with West Nile virus do not develop symptoms. Those who do may experience fever, nausea, headache and muscle aches lasting from several days to several weeks. In rare cases, the virus can cause severe illness, including meningitis or encephalitis, and can be fatal. People over age 50 are at greater risk of severe illness.
The Clay County Health Department conducts surveillance through laboratory testing of mosquito batches and responds to concerns involving potential mosquito breeding sites.
For more information, residents can contact the Clay County Health Department at 618-662-4406.