Disease Alerts

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.;

Number Confirmed: 2; 
Number Exposed: 27; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Usage: Racing; Confirmation Date: 3/20/2025; 

Comments: One of the twenty-four (24) exposed horses on the home premises tested positive for EIA, a 3–year–old Quarter Horse mare. The other twenty-three (23) potentially exposed horses on the home premises have initially tested negative for EIA and will remain under quarantine until their sixty (60) day retest.; 
Previous Alerts: 4266

Number Confirmed: 1; 

Horse 1: 
Age: 15; Gender: Mare; Breed: Quarter Horse (QH); Confirmation Date: 3/18/2025; Horse Status: Affected And Alive;

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

Horse 1: 
Age: 8; Gender: Gelding; Breed: Arabian; Onset of Clinical Signs: 3/15/2025; Clinical Signs: The gelding was evaluated by the referring veterinarian for colic and fever on 3/15/25, and was referred to a hospital for treatment and diagnostics. The gelding was admitted to the isolation facility and subsequently diagnosed with putative intestinal hyperammonemia secondary to Salmonella infection. He remains hospitalized, but is responding to medical management.; Confirmation Date: 3/18/2025; Horse Status: Isolated;

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

Horse 1: 
Age: 3; Gender: Stallion; Breed: Thoroughbred (TB); Usage: Racing; Onset of Clinical Signs: 3/7/2025; Clinical Signs: Fever, hind limb cellulitis; Confirmation Date: 3/13/2025; Horse Status: Affected And Alive;

Notice is given that an Animal and Facility Hold Order is hereby established to control and
prevent the spread of the disease identified as EHV-1. In accordance with the laws of the State of
Maryland, the following animal(s) and/or facility of animals are quarantined to the following
premises, now and until released: Laurel Park Racetrack Barn 31