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
Fresno County, CA
Outbreak Identifier: 5546
Alert ID: 2942
March 24, 2023
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 1; 
Number Exposed: 6; 
Facility Type: Private Facility; 
Age: 21; Gender: Mare; Breed: Mule; Usage: Retired; 
Clinical Signs: Asymptomatic, tested prior to interstate movement.; Confirmation Date: 3/21/2023; 
Comments: A 21-year-old mare mule in Fresno County has been confirmed positive for Equine Infectious Anemia (EIA). The mule has been quarantined on her home premises with 6 additional potentially exposed equids, 1 additional mule and 5 horses, none of which have had show or travel history in the past six months. An epidemiological investigation is ongoing but transmission is suspected to be via natural vectors (eg, biting flies). For more information and updates, go to:https://www.cdfa.ca.gov/ahfss/Animal_Health/EquineInfectiousAnemia.html. For more information about EIA go to: https://www.equinediseasecc.org/equine-infectious-anemia