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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: 7488
Alert ID: 5056
June 29, 2026
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 6; 
Number Exposed: 50; 
Number Euthanized: 6; 

Horse 1: 
Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Horse 2: 
Age: 3; Gender: Gelding; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Horse 3: 
Age: 6; Gender: Mare; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Horse 4: 
Age: 7; Gender: Gelding; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Horse 5: 
Age: 4; Gender: Mare; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Horse 6: 
Age: 5; Gender: Gelding; Breed: Quarter Horse (QH); Horse Status: Euthanized; 

Comments: Six (6) Quarter Horses in Santa Clara 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 was witnessed by CDFA veterinarians on June 26, 2026. Fifty (50) potentially exposed horses on the home premises have initially tested negative for EIA and will remain under quarantine until their sixty (60) day retest as per CDFA and USDA program requirements. CDFA has been on site with continued monitoring of the situation. Epidemiological tracing is ongoing, but these cases are linked to recent EIA cases in California.;
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