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Disease Alerts

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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Potomac Horse Fever
Stettler County, AB
Outbreak Identifier: 7558
Alert ID: 5130
August 13, 2026
Confirmed Case(s) - No Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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Potomac Horse Fever
Rutherford County, TN
Outbreak Identifier: 7556
Alert ID: 5128
August 13, 2026
Confirmed Case(s) - No Quarantine

Tennessee Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown;
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Potomac Horse Fever
Knox County, TN
Outbreak Identifier: 7550
Alert ID: 5122
August 11, 2026
Confirmed Case(s) - No Quarantine

Attending veterinarian

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Veterinary Hospital;
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Potomac Horse Fever
Green County, WI
Outbreak Identifier: 7522
Alert ID: 5093
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;
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