UTAH FARM BUREAU: Horse Owners Told to Take Caution as EHM Cases Emerge from Nevada


Utah Farm Bureau issued the following announcement on March 30.

Nevada officials are reporting multiple cases of an often-fatal neurological form of Equine Herpesvirus Myeloencephalopathy (EHM) in horses that have recently traveled in regional rodeo circuits, some of which have been in Utah.

“There have been no reported cases of the deadly form of EHM in Utah related to exposure of infected Nevada horses. However, the infected horses in Nevada had traveled in junior high, high school, and professional circuits in the region,” said Dr. Barry Pittman, Utah state veterinarian at the Utah Department of Agriculture and Food (UDAF). “As such, we are simply raising awareness of the issue and asking Utah horse owners to be cautious as they travel to shows and report any suspicion of EHM to the State Veterinarian’s office.”

There are nine forms of EHM worldwide, only three of which are a health risk, and one form or another is found in nearly all horses by two years of age with little or no side effects. The most concerning form of it, found in Nevada, is fairly rare and equine experts and veterinarians have not concluded why some contract it and others don’t.

EHM is usually spread by direct horse-to-horse contact through the respiratory tract and nasal secretions. It can also move indirectly through contact with physical objects that have virus contamination, and remain on them between seven and 30 days.

Symptoms can include fever, decreased coordination, urine dribbling, loss of tail tone, hind limb weakness, leaning against objects to find balance, lethargy and inability to rise. There are treatments for EHM, but they are not always effective and vaccines being used are limited in their scope of prevention.

“We’re advising horse owners to limit travel with their horses if possible, check ahead with rodeo or event personnel for any known cases or exposures at their facility; practice active biosecurity; don’t share tack, feed or water buckets, grooming equipment, stalls or trailers; and always clean and disinfect all of the previous on a regular basis,” said Pittman.

Owners with a horse that has been exposed to the more serious form of EHM and is exhibiting symptoms are urged to contact their veterinarian and they should report to the State Veterinarian’s office if they suspect EHM.

More information about EHM can be found here: https://ag.utah.gov/documents/EHM_brochure.pdf

Original source can be found here.

Source: Utah Farm Bureau

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