A Coggins test is a simple blood test that is used to help prevent the spread of Equine Infectious Anemia. It is sent to the laboratory for analysis.
Equine Infectious Anemia is a viral disease that can be deadly. Unfortunately there is no vaccine or cure for it. If a patient survives the disease, they will always carry it and may become sick again if they are stressed. Some horses just seem to be carriers, never getting sick themselves.