Disease Alerts

Updates on current disease outbreaks are listed here 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.



Equine Infectious Anemia
Los Angeles County, CA
Outbreak Identifier: 6195
Alert ID: 3652
March 28, 2024
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 2; 
Number Exposed: 10; 
Number Euthanized: 2; 

Horse 1: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Horse Status: Euthanized; 

Horse 2: 
Age: 8; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Racing; Confirmation Date: 3/20/2024; Horse Status: Euthanized; 

Comments: A 4–year–old Quarter Horse gelding and an 8–year–old Quarter Horse gelding in Los Angeles County were confirmed positive for Equine Infectious Anemia (EIA). 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 witnessed on March 22nd. Ten (10) potentially exposed horses on the home premises have initially tested negative for EIA and will remain under quarantine until their sixty (60) day retest. Epidemiological tracing is ongoing, but transmission is suspected to be iatrogenic and exposure primarily limited to a subset of an unsanctioned racing population.;