OnFocus – The Marathon County Health Department reports a dead bluejay found in Marathon County on July 15, 2018 has tested positive for West Nile virus. This is the first dead bird that tested positive for West Nile virus in Marathon County since surveillance for the mosquito‐ transmitted virus began May 1.
“The positive bird means that residents of Marathon County need to be more vigilant in their personal protective measures to prevent mosquito bites,” Joan Theurer, Health Officer
said.
West Nile virus is spread to humans through the bite of an infected mosquito. Mosquitoes acquire the virus by feeding on infected birds.
“Marathon County residents should be aware of West Nile virus and take some simple steps to protect themselves against mosquito bites,” Theurer said. “West Nile virus is here to stay, so the best way to avoid the disease is to reduce exposure to and eliminate breeding grounds for mosquitoes.”
The majority of people (80%) who are infected with West Nile virus do not get sick. Those who do become ill usually experience mild symptoms such as fever, headache, muscle ache, rash, and fatigue. Less than 1% of people infected with the virus get seriously ill with symptoms that include high fever, muscle weakness, stiff neck, disorientation, mental confusion, tremors, confusion, paralysis, and coma. Older adults and those with compromised immune systems are at greater risk of developing central nervous system illness that can be fatal.
The Wisconsin Department of Health Services (DHS) has monitored the spread of West Nile virus since 2001 among wild birds, horses, mosquitoes, and people. During 2002, the state documented its first human infections and 52 cases were reported that year. During 2017, 48 cases of West Nile virus infection were reported among Wisconsin residents. West Nile virus infections in humans have been reported from June through October; however, most reported becoming ill with West Nile virus in August and September.
DHS will continue surveillance for West Nile virus until the end of the mosquito season. To report a sick or dead crow, blue jay, or raven, please call the Dead Bird Reporting Hotline at 1‐800‐433‐1610.
