Outbreaks | Equine Disease Communication Center

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.

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Equine Infectious Anemia

San Bernardino County, CA

Outbreak Identifier: 7428

Alert ID: 4993

May 08, 2026

Confirmed Case(s) - Official Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 6;
Number Exposed: 7;
Comments: Six (6) Quarter Horses in San Bernardino County were confirmed positive for Equine Infectious Anemia (EIA). Seven (7) potentially exposed horses on the home premises have initially tested negative for EIA and will remain under quarantine until the sixty (60) day retest as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation. Epidemiological tracing determined that the positive horses were linked to the other most recent San Bernardino County EIA incident and the current Riverside County EIA incident.;

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