Equine Piroplasmosis

American dog tick Dermacentor variabilis
Susan Ellis, USDA APHIS PPQ, Bugwood.org

What Is It and Why Should I Care?

Equine Piroplasmosis is a protozoal blood parasite disease of equines such as horses, donkeys, mules and zebras. The parasites are usually transmitted by ticks that feed on equines, but can also be spread from animal-to-animal by the transfer of blood in contaminated needles and syringes. The parasites that cause Equine Piroplasmosis are Theileria equi (formerly Babesia equi) and Babesia