The Utah state veterinarian’s office has now confirmed a total of six equine herpesvirus-1 (EHV-1) cases, according to a March 4 statement from the office. Two additional horses are exhibiting clinical signs and are undergoing tests, the statement said.

"The state veterinarian’s office is restricting the movement of animals at seven locations in Cache County as a precaution to prevent the spread of the disease," the statement read. "The outbreak remains confined to Cache County, as there have been no other reports of EHV-1 symptoms in horses in other areas of the state. Nonetheless, horse owners throughout Utah are advised to take extra biosecurity precautions when taking their animals to shows or public arenas."

The outbreak began Feb. 26 when two horses tested positive for the disease; two additional horses were confirmed to be EHV-1 positive the following day. Two horses have been euthanized as a result of the disease. The remaining animals are being treated and are under veterinary care, the statement read.

The statement also noted that the Cache County Fairgrounds Horse Arena has closed until further notice because most of the horses had been at the facility recently. "Horse owners who have taken their animals to the Cache County Fairgrounds Arena during the past 30 days should monitor their horse’s temperature and report concerns to their local veterinarian," the statement read