Equine infectous anemia (EIA) was first reported in 1843 and Valle and Carre demonstrated in 1904 that the causative agent was a filterable virus. It is an acute, subacute or chronic disease of Equidae characterized by fever, anemia, depression, edema, and emaciation.
Pearson, James E.
"Equine Infectious Anemia Diagnosis and Prevention,"
Iowa State University Veterinarian: Vol. 34
, Article 4.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol34/iss2/4