Is Your Horse Showing Signs of EHV? An Equine Expert Explains Next Steps to Take

A leading Oklahoma veterinarian explains common symptoms of Equine Herpes Virus (EHV) and warns owners to remain vigilant because it can spread quickly among horses.

WEATHERFORD, Oklah. (RFD-TV) — An ongoing Equine Herpes Virus (EHV) outbreak was recently detected following a rodeo event in Waco, Texas — it is raising concerns for horse owners across the South, but especially in nearby states.

A leading Oklahoma veterinarian is speaking out on the disease’s origin, warning the virus can spread quickly and that owners need to remain vigilant.

“EHV is a virus, a herpes virus, to be exact, in horses,” explains Dr. Jason Thorne, DVM, and the owner of Territory Medicine in Weatherford, Okla. “The good thing, for starters, is that it doesn’t affect humans -- but we can carry it, however. So, the herpes virus comes in two very distinct serovars, Type I and Type IV. There are other types, but in our population, really, it’s just I and IV causing problems. I believe what happened in Waco was going to be an EHV I, and that typically starts out as a predominantly respiratory infection, you know, notable to all of us, as far as a coughing horse or something like that, and that virus was probably shed by a horse that harbored it.”

With cases appearing across the region, Thorne said the most important step for owners is to act quickly if they suspect their horse is getting sick. Key signs of EHV include respiratory symptoms and fever.

“If you’re thinking your horse is looking like it might be sick or getting suspicious, then get yourself a digital thermometer,” he said. “Take a temperature at home, because, you know, we want you to stay home. We don’t want you to have to haul anywhere if you can help it. But get a temperature, then double-check it, and if it is over 101.5, get on the horn with your veterinarian and describe what you’re seeing and where you’ve been. What some people seem to forget with the rush of an outbreak is, wait a minute, where have I been? And not necessarily my horse, but where have I been with other horses and came home?”

Thorne urged owners to watch their horses closely and report any signs of illness immediately. As a precaution, many organizations are canceling events, urging owners to stop hauling, and implementing quarantine measures. Experts said vaccination remains one of the best tools to prevent EVH infections.

Marion is a digital content manager for RFD-TV and The Cowboy Channel. She started working for Rural Media Group in May 2022, adding a decade of experience in the digital side of broadcast media and some cooking experience to the team.

LATEST STORIES BY THIS AUTHOR:

The Sheinbaum–Rollins meeting signals progress, but the focus remains on fully containing screwworm before cross-border movement resumes.
The first-ever “MICHELIN Guide to the American South” awards stars to top restaurants across Georgia, Louisiana, the Carolinas, and Tennessee, and pinpoints the region as a global food destination for the first time.
Livestock profits are propping up overall sentiment, but crop producers remain cautious amid tight margins and uncertain policy signals.
Farmers for Free Trade Executive Director Brian Kuehl shares more about the tour to gather farmers’ insights on the economic challenges they face in the ag economy.
Recent U.S.–China trade developments provided a small lift for soy markets, though most traders are waiting for concrete purchase data before making major moves.
Wheat futures briefly hit a three-month high before retreating as the markets wait for word on whether the deal will actually happen.
Rural Lifestyle & Entertainment Shows
Brought to you by Gus Arrendale & Springer Mountain Farms, join dynamic bluegrass duo Dailey & Vincent as they welcome scores of fabulous bluegrass, country, and gospel music acts as special guests. Loads of laughs, your favorite guests galore, and lots of good times are guaranteed. Don’t miss all the fun!
Enjoy traditional country music from modern-day troubadours The Malpass Brothers. Each episode stars the brother duo of Chris & Taylor Malpass along with a featured celebrity guest– and loads of clever humor.
The affable and unassuming international singing star Daniel O’Donnell is one of Ireland’s best known performers – from Australia to Alaska.
Join popular polka performer Mollie Busta as she hosts the weekly “Mollie B Polka Party” on RFD-TV! The one-hour program features the nation’s top polka bands and a wide variety of ethnic styles produced on location at music festivals from around the country.
Ray’s Roadhouse is a weekly program featuring the music of Ray Benson and Asleep at the Wheel. Ray and his band Asleep at the Wheel has had a more than 50 year career in the music industry and over the years have earned nine Grammy Awards. The program also will feature guest performers such as Pat Green, Stoney LaRue and Kelly Willis.