SALEM, Ore. -- A second horse in Oregon has tested positive for a potentially fatal virus linked to a cutting horse show in Utah.
The Oregon Department of Agriculture said Thursday it had confirmed the equine herpes virus in a horse in Umatilla County that was in close contact with other horses that had attended the Utah show.
The Oregon Department of Agriculture said Wednesday that tests found the virus in a horse in Clackamas County that had close contact with horses that attended the Utah show.
The horses have been quarantined and so far have not shown any symptoms of the disease known as equine herpes virus.
"They're temping the horse," said state veterinarian Don Hansen. "Taking its temperature twice a day and they'll do that for another week."
Authorities have said that 18 Oregon horses were at the National Cutting Horse Association's Western National Championship held recently in Ogden, Utah.
The department says that the virus has also been confirmed in Washington, Idaho, California and Colorado.
"Circumstances could change and it could become much more widespread," said Hansen.