What is equine infectious anemia? Equine infectious anemia, or EIA, is a bloodborne viral disease transmitted primarily through insects, particularly horse flies and deer flies. It can infect horses, ponies, donkeys and mules. The equine infectious anemia virus (EIAV) is a lentivirus, a subfamily of retroviruses with long incubation periods. The human immunodeficiency virus (HIV), … Continue reading Equine Infectious Anemia: What to Know