EIA Discovered in Johnson County, Wyoming

A Johnson County horse was euthanized after testing positive for equine infectious anemia (EIA) in late June.
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A case of equine infectious anemia (EIA) was found in one horse located in Johnson County in late June, according to a release from the Wyoming Livestock Board.

The disease was found when testing was conducted as required for interstate horse movement. The affected horse was euthanized and all horses on the associated premises and adjacent premises located within 200 yards have been quarantined pending further testing. All quarantined animals have tested negative once for the disease and will undergo a second test in 60 days.

Equine infectious anemia is an incurable infectious disease of horses spread by biting flies, such as the horse fly and deer fly. The disease can cause fever, anemia, fluid accumulation on the chest or legs, and emaciation in some animals. The virus can also cross the placental barrier to cause fetal infection. Many horses do not show any clinical signs of disease or have very mild signs on first exposure and carry the virus subclinically.

The most common blood test to detect the disease is the Coggins test

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