Equine Infectious Anemia — United States
Equine infectious anemia is a viral disease attacking horses’ immune systems. The virus is transmitted through the exchange of body fluids from an infected to an uninfected animal, often by blood-feeding insects such as horseflies. It can also be transmitted through the use of blood-contaminated instruments or needles.
A Coggins test screens horses’ blood for antibodies which are indicative of the presence of the EIA virus. Most US states require horses to have proof of a negative Coggins