Multiple EEE Cases in Wisconsin Horses

Three of four horses confirmed with EEE in Wisconsin have been euthanized.
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Wisconsin Dunn Pepin Chippewa Counties map

Three of four horses confirmed with EEE in Wisconsin have been euthanized.

The Wisconsin Department of Agriculture, Trade and Consumer Protection reported confirmed cases of Eastern equine encephalitis (EEE) in horses located in Chippewa, Pepin and Dunn Counties.

Dunn County

Dunn County had two confirmed cases. The first was in a 5-year-old Appaloosa mare that had onset of clinical sign on August 1 that included ataxia, circling, falling, lethargy, tremors, twitching, teeth grinding and lip deviation. The unvaccinated mare was euthanized.

Also in Dunn County a 2-year-old Appaloosa colt had onset of clinical signs on August 6 that included ataxia, circling, depression, hind-end weakness, lip deviation and muscle fasciculations. The unvaccinated colt was euthanized.

Pepin County

In Pepin County, an 11-year-old Belgian mare had onset of clinical signs on July 30 that included fever, difficulty breathing, muscle fasciculations, proprioceptive deficits in the limbs and recumbency. The unvaccinated mare was euthanized.

Chippewa County

In Chippewa County, an 8-year-old Saddlebred gelding had onset of lcinical signs on August 5 that included ataxia, blindness, lip drooping, fever and stumbling. The unvaccinated gelding is recovering.

There have been five confirmed cases of EEE in Wisconsin in 2020.

Information for this report was provided by the Equine Disease Communication Center.

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