Equine infectious anemia is a notifiable viral disease with significant welfare and legal implications. Understanding the disease helps horse owners respond appropriately.
Equine infectious anemia causes significant suffering in acute cases through fever, severe anemia causing weakness and exercise intolerance, and systemic illness. Chronic carriers may have minimal clinical signs but present a welfare challenge as they must be permanently isolated or euthanized under notifiable disease regulations. The regulatory requirement for euthanasia of EIA-positive horses is a welfare decision that reflects the lifelong carrier status and risk to other horses. Prevention through avoidance of contaminated needles and biting fly control during peak seasons reduces transmission risk. Imported horses should be tested before mixing with existing populations.