BOULDER CITY, Nev. (AP) — Nevada wildlife officials have ordered a quarantine on a Boulder City horse facility after multiple horses contracted a contagious virus before being euthanized.

The state Department of Agriculture say lab results confirmed animals at the Horseman’s Association Property tested positive for horse herpes.

Department officials say the quarantine is a precautionary measure to avoid the spread of Equine Herpesvirus-1 among the 500 horses on the southwest Nevada property.

Officials say the virus is a highly transferrable disease between horses, or between horses and humans.

Horse owners say signs of the disease appear to be fever, cough or runny nose.