Equine infectious anemia

A viral disease affecting horses

For the test used to diagnose this disease, see Coggins test.

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A Coggins test form used to diagnose Equine Infectious Anemia

Equine Infectious Anemia (EIA) is a viral disease that affects horses and other members of the Equidae family. It is caused by the Equine infectious anemia virus (EIAV), which is a member of the Retroviridae family, specifically a lentivirus.

Transmission

EIA is primarily transmitted through the transfer of blood from an infected horse to a healthy horse. This can occur through the use of contaminated needles, syringes, or surgical instruments. Additionally, the virus can be spread by blood-feeding insects such as horseflies and deer flies.

Symptoms

Horses infected with EIA may exhibit a range of symptoms, which can vary in severity. Common symptoms include:

• Fever
• Depression
• Weight loss
• Anemia
• Swelling of the legs and lower chest

In some cases, horses may become carriers of the virus without showing any clinical signs, posing a risk of transmission to other horses.

Diagnosis

The most common method for diagnosing EIA is the Coggins test, a serological test that detects antibodies to the virus in the horse's blood. The test is named after Dr. Leroy Coggins, who developed it in the 1970s. A positive Coggins test indicates that the horse is infected with EIA.

Prevention and Control

Preventing the spread of EIA involves several strategies:

• Regular testing of horses using the Coggins test
• Quarantine and isolation of infected animals
• Use of sterile needles and equipment
• Control of blood-feeding insects

There is currently no vaccine available for EIA, and infected horses may need to be euthanized or permanently isolated to prevent transmission.

Related pages

• Equine infectious anemia virus
• Coggins test
• Retroviridae
• Lentivirus