While West Nile Virus can infect people of all ages, town officials said people over the age of 50 are at higher risk for severe infection. As an additional treatment step, Municipal Mosquito will conduct ground-based adult mosquito control, known as fogging and spraying, in the targeted areas by using organic solutions. This brings it up to 19 cases this year.
"The positive bird means that residents of Jefferson County need to be more vigilant in their personal protective measures to prevent mosquito bites", said Gail Scott, Jefferson County Public Health Director.
Symptoms typically take five to 15 days to develop.
The McLean County Health Department is reporting the first evidence of West Nile Virus in the county this year, but it is not a human case. During 2016, 13 cases of West Nile virus infection were reported among Wisconsin residents.
Check your window and door screens to make sure they're in good shape. The Health Department says the type of mosquitoes that were trapped are bird biting mosquitoes. The elderly and those with weak immune systems are the most vulnerable to the virus.
The majority of people (80 percent) who are infected with West Nile virus do not get sick. "Initial symptoms in those who become ill include fever, headache, nausea, vomiting, and tiredness".
West Nile season has arrived in McLean County.