Maryland state veterinarian Phyllis Cassano, DVM, announced today that an Anne Arundel County, Md., horse has tested positive for rabies. The 7-year-old Quarter Horse mare named Coup de Harmony had recently competed at the East Coast Barrel Bash in Harrington, Del., June 19-21.

The mare began showing clinical signs July 20, while still at the show. According to the owner’s report, she was acting aggressively, kicking, biting at the stall walls and door, head-pressing, and biting at her sides. The mare was euthanized June 26 at the treating veterinarian’s facility in Cecil County. Officials at the Maryland Department of Agriculture received the positive test results on submitted tissue June 27, and since have been calling a list of exhibitors from the horse show