Illinois Reports First Case of Rare Tick-Borne Powassan Virus

Illinois health officials have issued a warning after confirming the state's first confirmed case of the Powassan virus, a rare but serious tick-borne illness. The case involved a resident who developed severe symptoms, raising concerns about the presence of this virus in the region.

The Illinois Department of Public Health (IDPH) has not yet determined whether the individual was infected locally within Illinois, but measures are underway to test ticks across the state for the virus. As warm weather persists, the risk of tick-borne diseases remains a concern for residents.

Dr. Sameer Vohra, IDPH director, emphasized the importance of protection against ticks, especially during outdoor activities in wooded or grassy areas. He recommended wearing protective clothing, using tick repellents, and conducting thorough tick checks after outdoor exposure. If symptoms such as fever, fatigue, headache, vomiting, or weakness emerge following potential tick exposure, prompt medical attention is advised.

The Powassan virus, transmitted predominantly by infected blacklegged ticks, is rare but can lead to severe health complications including brain inflammation, meningitis, and neurological issues such as confusion, speech difficulties, loss of coordination, and seizures. Currently, there is no specific antiviral treatment available. Prevention focuses on avoiding tick bites through protective clothing, diligent tick checks, and heat-drying clothes to eliminate any ticks.

Further information on tick bite prevention can be found on the CDC’s website. Health officials continue to monitor tick populations in Illinois to prevent further cases and ensure public safety.

Source: https://medicalxpress.com/news/2025-09-illinois-case-rare-borne-powassan.html