Disease Alerts

Number Confirmed: 1; 
Number Euthanized: 1; 

Horse 1: 
Age: 6; Gender: Stallion; Breed: Andalusian; Onset of Clinical Signs: 7/22/2026; Clinical Signs: fever, grade 4 ataxia, muscle fasciculations; Confirmation Date: 7/29/2026; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

Comments: The second (2nd) case of West Nile Virus in California in 2026 was confirmed in Sacramento County. On July 29, 2026, an unvaccinated 6-year-old Andalusian stallion in Sacramento County displaying neurologic signs was confirmed positive for West Nile Virus. The stallion was euthanized due to severity of clinical signs;

Number Confirmed: 1; 
Number Exposed: 12; 

Horse 1: 
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/13/2026; Clinical Signs: Lethargy, fever, nasal discharge, anorexia, ocular discharge; Confirmation Date: 7/15/2026; Horse Status: Recovering; Vaccination Status: Vaccinated;

Number Confirmed: 1; 
Number Exposed: 63; 
Facility Type: Private Facility; 

Horse 1: 
Age: 28; Gender: Mare; Breed: Haflinger; Usage: Trail Riding; Clinical Signs: none; Horse Status: Quarantined; 

Comments: Horse was bought from riding camp herd dispersal in February with no previous Coggins test history. The new owner tested during routine spring vaccine visit. Disease trace investigation is in progress.;

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;

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 2; Gender: Mare; Breed: Friesian; Onset of Clinical Signs: 6/18/2026; Clinical Signs: Submandibular abscess; Confirmation Date: 6/22/2026; Horse Status: Recovering; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Exposed: 2; 

Horse 1: 
Age: 20; Gender: Mare; Breed: Paint; Clinical Signs: Submandibular abscessation; Confirmation Date: 7/25/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: Affected horse came from a rescue;

Number Confirmed: 2; 
Number Exposed: 1; 
Number Euthanized: 2; 
Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these cases and was witnessed by CDFA veterinarians on May 20th. The one (1) potentially exposed horse on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4994

Number Confirmed: 6; 
Number Exposed: 7; 
Number Euthanized: 6; 
Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these cases and was witnessed by CDFA veterinarians on May 18th. The seven (7) potentially exposed horse on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4993

Number Confirmed: 1; 
Number Exposed: 9; 

Horse 1: 
Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 6/11/2026; Clinical Signs: Nasal discharge, facial swelling; Horse Status: Recovering; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Showgrounds; 

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Rodeo; Onset of Clinical Signs: 7/23/2026; Clinical Signs: Fever, ocular and nasal discharge, cough; Confirmation Date: 7/24/2026; Horse Status: Quarantined; Vaccination Status: Unvaccinated;

Comments: Horse tested positive for both Influenza and Strangles.;