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

Santa Clara County, CA

Outbreak Identifier: 7408

Alert ID: 4961

April 21, 2026

Confirmed Case(s) - Official Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;

Horse 1:
Age: 5; Gender: Gelding; Breed: Quarter Horse (QH); Confirmation Date: 4/20/2026; Horse Status: Affected And Alive;

Comments: A 5–year–old Quarter Horse gelding in Santa Clara County was confirmed positive for Equine Infectious Anemia (EIA). The gelding has been quarantined on premises with no additional exposed horses on the property. Epidemiological tracing is ongoing, but transmission is suspected to be iatrogenic.;

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