Potomac Horse Fever
Green County, WI
Alert ID: 5005
July 29, 2026
Confirmed Case(s) - No Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 2; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 14; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/22/2026; Clinical Signs: watery diarrhea/fever; Confirmation Date: 7/24/2026; Horse Status: Recovering; Vaccination Status: Vaccinated;

Horse 2: 
Age: 20; Gender: Gelding; Breed: Thoroughbred (TB); Onset of Clinical Signs: 7/22/2026; Clinical Signs: lethargy, fever, dehydration, (later) diarrhea; Confirmation Date: 7/24/2026; Horse Status: Recovering; Vaccination Status: Vaccinated;