Equine Infectious Anemia
Riverside County, CA
Alert ID: 4906
May 08, 2026
Confirmed Case(s) - Official Quarantine

California Department of Food and Agriculture

Number Confirmed: 2; 
Number Exposed: 1; 

Horse 1: 
Age: 4; Gender: Stallion; Breed: Quarter Horse (QH); 

Horse 2: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); 

Comments: A 4–year–old Quarter Horse stallion and a 5-year-old Quarter Horse mare in Riverside County were confirmed positive for Equine Infectious Anemia (EIA). One (1) potentially exposed horse on the home premises has 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 recent San Bernardino County EIA incidents.;