Equine Infectious Anemia (EIA)

Positive Case of EIA Confirmed in Saskatchewan

On Feb. 17, 2021, positive equine infectious anemia (EIA) results were confirmed by the Canadian Food Inspection Agency’s (CFIA) national reference laboratory for a horse located on a premises in the rural municipality of Kinistino, SK. For the full disease advisory, visit the Canadian Animal Health Surveillance System’s Disease Alerts Tool.


EIA, also known as “swamp fever,” is a viral disease of horses and other equids (i.e. donkeys, mules, and zebras) that causes recurrent episodes of fever, lethargy and destruction of red blood cells (anemia) and platelets (thrombocytopenia).

Most EIA-infected horses show no clinical signs of disease; however, they remain carriers of the virus for life and can be a source of infection for susceptible animals.

In Canada, EIA is listed as a reportable disease under the Health of Animals Act. Accordingly, when EIA is suspected, it must be reported to the Canadian Food Inspection Agency (CFIA).

With neither cure nor vaccine in existence, veterinarians and ­researchers must supervise the equine infectious anemia virus ­closely to avoid widespread disease

Canadian Food Inspection Agency

Canadian Animal Health Surveillance System (CAHSS)

Alberta Veterinary Medical Association 

Other Resources

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