EIA Quarantine Released at California Facility

The barn in Los Angeles County where 2 horses previously tested positive for EIA has been released from quarantine.
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A barn in Los Angeles County, California, where two horses previously tested positive for EIA, has been released from quarantine.
A barn in Los Angeles County, California, where two horses previously tested positive for EIA, has been released from quarantine. | Adobe Stock

In late March, two Quarter Horses at a facility in Los Angeles County, California, tested positive for equine infectious anemia (EIA) and were euthanized. The barn was placed under quarantine. The 10 potentially exposed horses at the facility have since tested negative for EIA on their 60-day retest. The quarantine on the premises has been released. 

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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