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 Joaquin County, CA

Outbreak Identifier: 7393

Alert ID: 4945

April 10, 2026

Confirmed Case(s) - Official Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;

Horse 1:
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 4/9/2026;

Comments: A 3–year–old Quarter Horse gelding in San Joaquin County was confirmed positive for Equine Infectious Anemia (EIA). Epidemiological tracing determined that this horse had recently trained on the same premises as the current Stanislaus County EIA incident. The gelding has been quarantined on premises with no additional exposed horses on the property. Related to previous alert ID: 4938.;

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