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Rare mosquito-borne virus confirmed in East Tennessee
WVLT • • health
Key Points:
- The CDC has confirmed a rare neuroinvasive case of La Crosse virus in Claiborne County, Tennessee, marking the only human infection reported in the state for 2026 and one of just four cases nationwide this year.
- La Crosse virus, transmitted by the eastern tree hole mosquito, is native to the Appalachian forest ecosystem and can cause severe neurological illnesses such as encephalitis and meningitis, though most infections are mild or asymptomatic.
- East Tennessee is a historical hotspot for La Crosse virus, with previous cases reported in Knox County, including six hospitalized children in 2024 and two cases in 2025.
- Health officials urge residents to prevent mosquito bites by eliminating standing water, using EPA-approved insect repellents, securing window screens, and wearing protective clothing during peak mosquito activity.
- Local health departments will continue monitoring mosquito populations and report any new cases or infections to the CDC to track the spread of the virus.
