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News Article

AAEP publishes equine parvovirus-hepatitis guidelines

Equine parvovirus-hepatitis (EqPV-H) has been proposed as the aetiological cause of Theiler's disease, also known as serum hepatitis

The American Association of Equine Practitioners (AAEP) has published guidelines to educate practitioners about transmission, risk factors, clinical signs and other considerations pertaining to equine parvovirus-hepatitis virus (EqPV-H), a recently discovered virus capable of causing hepatitis in infected horses.

Two distinct aetiologies of EqPV-H infection are recognized: biologic transmission occurs through the administration of biologic products containing EqPV-H and non-biologic transmission occurs sporadically in horses with no history of receiving biologic products. Asymptomatic infection is common; only a small percentage of infected horses will develop clinical signs of liver disease.

“Drs. Thomas Divers and Bud Tennant of Cornell University College of Veterinary Medicine discovered that this novel parvovirus was associated with the disease ‘serum sickness’ in horses who had recently been administered a parvovirus-infected biologic,” said guidelines co-author Dr. Piper Norton. “Because of their seminal research and active ongoing research, information will be learned about this virus that will assist in making biologics safer for use in horses and help with diagnosis and treatment of this disease.”

It is noted that EqPV-H is a recently discovered virus and the focus of rapidly evolving research. The AAEP guidelines reflect knowledge at the time of writing. Practitioners are encouraged to seek further consultation for questions regarding clinical cases of EqPV-H.

The Equine Parvovirus-Hepatitis Virus (EqPV-H) Guidelines, authored by Linda Mittel, Piper Norton, Joy Tomlinson and Thomas Divers, can be viewed at:

Article details

  • Date
  • 08 April 2021
  • Source
  • AAEP