Equine infectious anemia, also known as swamp fever, spiked in the 1930’s and again in the 60’s and 70’s—and it was during the 70's when it infected almost half of the wild Chincoteague pony herd. The disease, spread primarily through biting flies, is characterized by episodes of fever, as well as swelling, weight loss, and loss of stamina. Some infected horses can go up to a year without displaying symptoms after their initial infection, which would make the disease difficult to observe in wild ponies. EIA has been around for centuries, but to this day there is no successful treatment and no vaccine available in the United States. In 1973, the Coggins test, which determines if a horse is infected with EIA, was approved by the US Department of Agriculture. The Coggins test was used on Chincoteague ponies the very next year on two foals that were bought at Pony Penning and taken to New Jersey, where they began showing symptoms. Upon this news, both the Chincoteague Volunteer Fi...
The stories behind the beloved breed