Disease Alerts

Number Exposed: 2;

Number Confirmed: 1; 
Number Exposed: Unknown;

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: 12; 

Horse 1: 
Age: Yearling; Gender: Colt; Breed: Mustang; Onset of Clinical Signs: 3/15/2025; Clinical Signs: Purulent nasal discharge, fever; Confirmation Date: 3/21/2025; Horse Status: Affected And Alive; 

Horse 2: 
Age: Weanling; Onset of Clinical Signs: 2/17/2025; Clinical Signs: Nasal discharge; Horse Status: Affected And Alive;

Number Exposed: 5;

Number Confirmed: 1; 
Number Exposed: 2; 

Horse 1: 
Age: 7; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; 

Comments: A 7–year–old Quarter Horse gelding in San Bernardino County was confirmed positive for Equine Infectious Anemia (EIA). Two (2) potentially exposed horses on the home premises have been tested for EIA with results pending. The two potentially exposed horses will remain under quarantine until pending lab results are received and their sixty (60) day retest samples are completed as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation, epidemiological tracing is ongoing.;

Number Confirmed: 1; 
Number Exposed: 17; 
Number Euthanized: 1; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 22; Gender: Mare; Breed: Appaloosa; Usage: Pleasure Riding; Onset of Clinical Signs: 3/10/2025; Clinical Signs: Urine retention, bladder atony, hindlimb ataxia; Confirmation Date: 3/14/2025; Horse Status: Euthanized; Vaccination Status: Vaccinated;

Comments: The premises is a boarding facility with no travel history in the two weeks prior to the presentation of clinical signs. The state veterinarian reports that the risk to the general horse population of Gallatin County is relatively low.;

Number Confirmed: 1; 
Facility Type: Veterinary Hospital; 

Horse 1: 
Age: 1; Gender: Stallion; Breed: Quarter Horse (QH); Onset of Clinical Signs: 12/23/2024; Clinical Signs: Neurologic, excessive salivation; Confirmation Date: 1/6/2025; Horse Status: Deceased; Vaccination Status: Unvaccinated;

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

Number Confirmed: 1; 
Number Suspected: 2; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Under veterinary care and doing well.;

Number Confirmed: 1; 
Number Exposed: 41; 
Number Euthanized: 1; 

Horse 1: 
Age: 16; Gender: Mare; Breed: Pony; Onset of Clinical Signs: 3/17/2025; Confirmation Date: 3/19/2025; Horse Status: Euthanized; 

Comments: A 16-year-old Pony mare from Santa Barbara County displaying neurologic signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1). The mare was euthanized due to the severity of clinical symptoms. The mare had recently attended a show but did not show any clinical symptoms until after the event concluded. Forty-one (41) potentially exposed horses at the home premise in Santa Barbara County were quarantined by CDFA with enhanced biosecurity measures implemented. CDFA will continue to actively monitor the situation. This premises has no known epidemiological link to the Ventura County EHM premises.;