A Coggins test screens horses' blood for antibodies that are indicative of the presence of EIA. | Photo: Erica Larson/The Horse

A horse stabled in Montgomery County, Maryland, has tested positive for equine infectious anemia (EIA).

The positive horse was discovered during a routine wellness examination by a private veterinarian and was confirmed positive July 9 by the National Veterinary Services Lab, in Ames, Iowa. The infected horse will be euthanized.

The Maryland State Veterinarian’s office has placed the farm under a 60-day investigational hold order. The department will do initial EIA tests on the remaining 42 equids on the farm. The animals will be tested again after 60 days, at which point the hold order will be released barring any positive test results