Confirmed Case(s) – No Quarantine
Source: Utah Department of Agriculture and Food
San Juan County, UT:
Number Confirmed: 1
Number Exposed: 4
Facility Type: Farm
Horse 1:
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Usage: Breeding; Onset of Clinical Signs: 9/19/2025; Clinical Signs: Pregnant mare with forelimb ataxia. Treated by veterinarian with anti-inflammatories and antimicrobials. Ataxia resolving by the next day.; Confirmation Date: 9/29/2025; Horse Status: Recovering; Vaccination Status: Undervaccinated.
Comments: housed close to feral horse population.
Summit County, UT:
Number Confirmed: 1
Number Exposed: 1
Facility Type: Private Facility
Horse 1:
Age: 3; Gender: Filly; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/26/2025; Clinical Signs: Mild weakness and stumbling ataxia. Recovering while undergoing 5d standard hospitalized treatment of antimicrobials, anti-inflammatories and steroids.; Confirmation Date: 10/2/2025; Horse Status: Recovering; Vaccination Status: Unvaccinated.
Tooele County, UT:
Number Confirmed: 1
Number Exposed: 6
Number Euthanized: 1
Facility Type: Private Facility
Horse 1:
Age: 4; Gender: Gelding; Onset of Clinical Signs: 9/20/2025; Clinical Signs: Found down, no elevated temperature or additional signs. treated for 1 day and euthanized due to failure to respond to treatment.; Horse Status: Euthanized; Vaccination Status: Unvaccinated.
See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts
Updates on current disease outbreaks are listed on our EDCC website 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. All information is sourced from: http://equinediseasecc.org/alerts/outbreaks
