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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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Sonoma County, CA
Outbreak Identifier: 7567
Alert ID: 5139
August 17, 2026
Confirmed Case(s) - Voluntary Quarantine

Attending veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 30; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 25; Gender: Mare; Breed: Thoroughbred (TB); Usage: Therapy; Onset of Clinical Signs: 8/7/2026; Clinical Signs: cough; Confirmation Date: 8/13/2026; Horse Status: Isolated;