Equine Viral Disease Laboratory
UC Davis School of Veterinary Medicine
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New and emerging equine viral diseases have a very significant and adverse impact on the sport horse industry in the United States and throughout the world. The recent unchecked progress of diseases such as equine viral arteritis, vesicular stomatitis, African horse sickness, and Hendra virus disease has adversely impacted some of our most valuable equine athletes and has caused severe disruption and considerable economic loss at all levels in competitive equine sports, including the Olympic Games.

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The World Organisation for Animal Health, officially known as the OIE (Office International
des Epizooties), monitors the emergence of diseases that have the potential to affect animal health worldwide. They have developed a list of animal diseases, including those for the horse, which by international agreement must be reported to them within a specified time frame. Rapid detection, accurate reporting and effective response to any disease, whether a new or pre-existing one, is clearly crucial to safeguarding animal health worldwide. The following equine diseases must be reported to the OIE:

African Horse Sickness Western Equine Encephalomyelitis
  Dourine   Eastern Equine Encephalomyelitis
  Equine Infectious Anemia   Equine Rhinopneumonitis
  Equine Influenza   Surra (Trypanosoma evansi)
  Equine Piroplasmosis   Glanders
  Contagious Equine Metritis   Equine Viral Arteritis
Equine viral diseases known to be present in the United States are listed below:
  Bunyaviruses (Powassan, Main Drain)   Equine Rhinovirus
  Eastern Equine Encephalitis   Equine Rotavirus
  Equine Adenovirus   Equine Viral Arteritis
  Equine Herpesviruses 1-5   Rabies Virus
  Equine Infectious Anemia   Western Equine Encephalitis Virus
  Equine Influenza   Venezuelan Encephalitis Virus (periodically)
  Equine Papilloma Virus Sarcoids   Vesicular Stomatitis Virus (periodically)