A Clare County Horse Was Euthanized After an EEE Diagnosis

Hot, muggy weather creates the perfect environment for mosquitoes to turn you and your Michigan backyard into an itch-inducing buffet serving up welts and, potentially, disease.

RELATED: Michigan Mosquito Warning: Human EEE Case Confirmed

The usual suspects, like West Nile virus, Jamestown Canyon virus, and La Crosse Encephalitis, are still likely to be circulating among mosquitoes in the Mitten State. However, recent news brings another familiar virus into the conversation: eastern equine encephalitis (EEE).

EEE Confirmed in a Clare County Horse

EEE is more than just another irritating mosquito-season development. In fact, the Michigan Department of Agriculture and Rural Development (MDARD) reports that a one-year-old Quarter Horse in Clare County was just euthanized after testing positive for the virus. This is Michigan's first confirmed EEE case in a domestic animal in 2026, but it's not the first case overall.

Can Horses Give EEE to People?

a mosquito sitting on top of a piece of paper

A Roscommon County resident was recently diagnosed with EEE as well, but it wasn't transmitted from a horse or any other equine. As with other animals, a mosquito carrying the virus is the culprit. The virus cannot be passed between horses, from horses to people, or from people to people.

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Sadly, those who contract severe EEE have a 30% fatality rate among people who contract it. So, to say that this is something you should avoid would be an understatement. Experts advise Michiganders to lather up with EPA-approved repellent, wear long sleeves, check their screens for holes, and dump any standing water found near their home.

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Horse owners are being encouraged to explore EEE vaccination options with their veterinarian. Late summer and early fall remain prime EEE season, so getting mosquito protection matters, even as fall knocks on Michigan's door.