West Nile Virus

Confirmed Case(s) – No Quarantine Source: Attending Veterinarian Number Confirmed: 1; Number Exposed: 3; Number Euthanized: 1; Facility Type: Farm; Previous Alerts: 4649 See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates 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 … Read More

Confirmed Case(s) – No Quarantine Source: Utah Department of Agriculture and Food Number Confirmed: 1 Number Exposed: 9 Facility Type: Farm Horse 1: Age: 3; Gender: Filly; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 10/1/2025; Clinical Signs: Reluctance to move and seemed painful with lip twitching. Treated with NSAIDs and antimicrobials for 4 days. Fully recovered; Confirmation Date: 10/7/2025; Horse Status: Recovered; Vaccination Status: Vaccinated See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts … Read More

Confirmed Case(s) – No Quarantine Source: Attending Veterinarian Number Confirmed: 1 Number Exposed: 3 Facility Type: Farm See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates 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 … Read More

Confirmed Case(s) – No Quarantine Source: Utah Department of Agriculture and Food San Juan County, UT: Number Confirmed: 1Number Exposed: 4Facility 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 … Read More

Confirmed Case(s) – No Quarantine Source: State Veterinarian Office and Attending Veterinarian Number Confirmed: 1Number Exposed: UnknownFacility Type: Private FacilityComments: Undervaccinated horse. Mild ataxia. Recovering under vet care. See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date … Read More

Confirmed Case(s) – No Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1;  Horse 1: Age: 1; Gender: Colt; Breed: Friesian; Onset of Clinical Signs: 9/22/2025; Clinical Signs: ataxia (worse in hind end), hyperreactive, muscle fasciculations, hypermetric front end; Confirmation Date: 9/29/2025; Vaccination Status: Unvaccinated; Comments: The fifth (5th) case of West Nile Virus in California in 2025 was confirmed in Sacramento County. On … Read More

Confirmed Case(s) – No Quarantine Source: Utah Department of Agriculture and Food Source: State Veterinarian Office and Attending Veterinarian Number Confirmed: 1; Facility Type: Private Facility; Comments: Horse has been in rodeos all over northwest and originally from TX. Due to further investigation, the horse was exposed in Idaho, so we are removing from our reportable disease system.Previous … Read More

Confirmed Case(s) – No Quarantine Source: Utah Department of Agriculture and Food Box Elder County: Number Confirmed: 1Number Suspected: 1Number Exposed: Unknown Rich County: Number Confirmed: 1Number Exposed: Unknown See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they occur and will include the date … Read More

Confirmed Case(s) – No Quarantine Source: California Department of Food and Agriculture Number Confirmed: 1 Horse 1: Age: 2; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/14/2025; Clinical Signs: ataxia (worse in front end), collapsing, leaning on wall, drooping ear; Confirmation Date: 9/18/2025; Horse Status: Affected And Alive; Vaccination Status: Vaccinated; Comments: The third (3rd) case of West Nile Virus in California in 2025 was … Read More

Confirmed Case(s) – No Quarantine Source: attending veterinarian Number Confirmed: 1Number Exposed: 8Facility Type: Private Facility Horse 1: Age: Yearling; Gender: Filly; Breed: Quarter Horse (QH); Usage: young stock; Onset of Clinical Signs: 9/15/2025; Clinical Signs: acute ataxia, hypermetric, hyperesthestic; Confirmation Date: 9/17/2025; Horse Status: Affected And Alive; Vaccination Status: Undervaccinated See past published Outbreak Alerts: https://nwhorsesource.com/category/news/alerts Equine Disease Communication CenterUpdates on current disease outbreaks are listed on our EDCC website as they … Read More