Equine Herpesvirus Myeloencephalopathy Quarantine Lifted

Officials lift quarantine enacted following Carroll County, Indiana, mare’s death and diagnosis.
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Equine Herpesvirus Myeloencephalopathy Quarantine Lifted
In many horses, the first or only sign of EHV-1 infection is fever, which can go undetected. | Photo: Stephanie L. Church/The Horse
On July 27, officials lifted the 21-day quarantine that followed the confirmed equine herpesvirus diagnosis of a 13-year-old Thoroughbred mare from Carroll County, Indiana. The mare, originally seen by veterinarians at Purdue University’s Veterinary Teaching Hospital, in Lafayette, presented with neurologic signs and fever. Veterinarians euthanized her after she become recumbent (unable to rise) and confirmed an equine herpesvirus myeloencephalopathy (EHM) diagnosis following testing.

Officials quarantined the farm, and veterinarians monitored the temperatures of all horses on the premises twice daily for 21 days. No other horses in Indiana have tested positive for equine herpesvirus in association with this case.

Disease prevention is the best method of disease control. “Biosecurity is always important to prevent any disease spread,” said Sandy Norman, DVM, Indiana Board of Animal Health director of the companion and equine division. “EHV-1, the neurologic form, is a reportable disease requiring quarantine and twice-daily temperature monitoring to minimize the disease’s effect on the horse population.”

EHV 101

Herpesvirus is highly contagious among horses and can cause a variety of ailments in equids, including rhinopneumonitis (a respiratory disease usually found in young horses), abortion in broodmares, and EHM

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Written by:

Diane Rice earned her bachelor’s degree in agricultural journalism from the University of Wisconsin, then married her education with her lifelong passion for horses by working in editorial positions at Appaloosa Journal for 12 years. She has also served on the American Horse Publications’ board of directors. She now freelances in writing, editing, and proofreading. She lives in Middleton, Idaho, and spends her spare time gardening, reading, serving in her church, and spending time with her daughters, their families, and a myriad of her own and other people’s pets.

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