A horse exhibiting neurologic signs at a Wright County, Minn., farm has tested positive for equine herpesvirus-1 (EHV-1), and several other horses residing at that farm were found to be shedding the virus, according to a statement from Anoka Equine Veterinary Services, in Elk River, Minn.

The horse's neurologic signs were first detected on March 29, and the clinic received the positive test result today (April 3), Anoka Equine announced on their Facebook page.

"All horses on this farm were tested to screen them for EHV-1," the April 3 statement read. "Of those tested, additional horses came back positive for shedding the virus, but they are not showing neurologic signs at this time." Horses in this situation are often referred to as "subclinical shedders," or horses that appear healthy on the outside but are experiencing active infection, with the potential of shedding—and spreading—the virus.

The clinic said those horses will be retested in three weeks to determine their shedding status