A horse at the Fair Hill Training Center (FHTC) in Elkton, Md., is in quarantine with a suspected case of equine herpesvirus-1 (EHV-1).

According to a post on the training center’s website, "The horse with the unconfirmed case of EHV-1 has been isolated, and the barn that he was in has also been isolated as a precautionary measure. The rest of the horses at the facility have not been affected; we will continue to monitor the situation closely."

Kathleen Anderson, DVM, owner and manager of the Elkton-based Equine Veterinary Care, PC, told The Horse that "the isolated horse exhibited an elevated temperature prior to a colic episode and subsequent moderate neurologic signs." The horse tested negative on serology for equine protozoal myeloencephalitis, she said, and was also tested for EHV-1. Anderson said both “buffy coat” (a type of blood test) and nasal swab samples on the isolated horse were sent to both the Maryland Deptartment of Agriculture and University of Kentucky Veterinary Diagnostic Laboratory.

"The ‘buffy coat’ samples were negative; however, the PCR nasal swab sample demonstrated a weak positive with no evidence of neuropathogenic strain mutation," she said