The Illinois Department of Public Health has confirmed a rare case of Powassan virus, a tick-borne illness, in an Illinois resident. This marks the first reported instance of the virus in the state, prompting health officials to investigate how the exposure occurred. Transmitted by black-legged deer ticks, Powassan can cause a range of symptoms, including fever, headache, and vomiting. More severe cases may lead to encephalitis or meningitis, with symptoms such as confusion, loss of coordination, and seizures. The illness is not spread person-to-person by casual contact. In response, the Illinois Department of Public Health will conduct active surveillance, collecting and testing ticks in locations where the patient had visited. Residents are advised to use tick prevention measures when spending time outdoors in grassy or wooded areas. The department emphasizes the importance of early detection and immediate medical attention if symptoms develop following a tick bite. Further updates are expected as the investigation continues.
“With warm weather still prevalent, tick-borne diseases remain a potential threat here in Illinois,” said IDPH Director Dr. Sameer Vohra. “It’s important for everyone to guard against tick bites and the serious illnesses they can cause. We urge everyone to ‘Fight the Bite’ by reducing opportunities for exposures and repelling tick bites by wearing preventive clothing. If you have been in a wooded or grassy area where ticks are common and you begin to show symptoms like fever, fatigue, or headache, see a health care provider immediately.”
