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Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.



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Equine Influenza
St. Croix County, WI
Outbreak Identifier: 7414
Alert ID: 4968
April 23, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 4/21/2026; Confirmation Date: 4/22/2026; Horse Status: Affected And Alive; Vaccination Status: Undervaccinated;

Comments: The horse and owner are based in Wisconsin. The horse has been seen by, and is thought to still be hospitalized at a clinic in Minnesota (just across the border). The horse became ill after attending an event in Minnesota. 
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