While EIA is an uncommon occurrence, it is becoming somewhat more prevalent in racing Quarter Horses and bush-track racehorses. There also have been cases springing up across North America.
At the 2017 North American Veterinary Conference, Erin Groover, DVM, DACVIM, presented a case study on a horse with EIA. She reported that possible clinical signs that lend suspicion to an EIA infection include:
- hemolytic anemia
- weight loss
- etechial hemorrhage
- distal limb edema
- pale mucous membranes
These clinical signs could be attributed to a variety of differential diagnoses: purpura hemorrhagica, autoimmune disorders, equine viral arteritis virus, neoplasia, liver disease or internal abscesses.
Running a Coggins test or ELISA test on blood can quickly rule EIA in or out.