Anytime horses or owners leave the farm to compete, breed, train, or go to a veterinary hospital they can be exposed to all kinds of disease agents and there is an increased risk for the spread of diseases such as Equine Herpes Myeloencephalophathy (EHM), Equine Herpes Virus (EHV-1), Equine Infectious Anemia (EIA), and Equine Piroplasmosis.