Horses in Two Texas Counties Test Positive for EIA

Two cases of equine infectious anemia were reported on July 11, 2022.
The cases are located in Fort Bend County and Parker County, TX, identified in red on the map of the state. 

On July 11, the Texas Animal Health Commission (TAHC) reported two positive cases of equine infectious anemia in the state. Two Quarter Horses, one in Fort Bend County and another in Parker County, tested positive, and the facilities are under official quarantine until they meet TAHC requirements for release. The Parker County case has been euthanized. Veterinarians and owners at both properties are closely monitoring potentially exposed horses and have biosecurity measures in place.

To read the alert and others, click here.

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.

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