EIA in Oklahoma Horse

A Quarter Horse stallion in Oklahoma County, Oklahoma, has tested positive for EIA, and six other horses are exposed.
A Quarter Horse stallion in Oklahoma County, Oklahoma, has tested positive for EIA, and six other horses are exposed.
A Quarter Horse stallion in Oklahoma County, Oklahoma, has tested positive for EIA, and six other horses are exposed. | Wikimedia Commons

A 4-year-old Quarter Horse stallion used for racing in Oklahoma County, Oklahoma, has tested positive for equine infectious anemia (EIA). The horse resides at a training facility, where six other horses are exposed. The positive horse is asymptomatic and has been isolated. The exposed horses have undergone initial testing and are all negative. Epidemiologic investigation is ongoing at this time.

EDCC Health Watch is an Equine Network marketing program that utilizes information from the Equine Disease Communication Center (EDCC) to create and disseminate verified equine disease reports. The EDCC is an independent nonprofit organization that is supported by industry donations in order to provide open access to infectious disease information.

About EIA

Equine infectious anemia is a viral disease that attacks horses’ immune systems. The virus is transmitted through the exchange of body fluids from an infected to an uninfected animal, often by blood-feeding insects such as horseflies. It can also be transmitted through the use of blood-contaminated instruments or needles.

Coggins test screens horses’ blood for antibodies that are indicative of the presence of the EIA virus. Most U.S. states require horses to have proof of a negative Coggins test to travel across state lines.

Once an animal is infected with EIA, it is infected for life and can be a reservoir for the spread of disease. Not all horses show signs of disease, but those that do can exhibit:

  • Progressive body condition loss;
  • Muscle weakness;
  • Poor stamina;
  • Fever;
  • Depression; and
  • Anemia.

EIA has no vaccine and no cure. A horse diagnosed with the disease dies, is euthanized, or must be placed under extremely strict quarantine conditions (at least 200 yards away from unaffected equids) for the rest of his life.

Brought to you by Boehringer Ingelheim, The Art of the Horse
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