More cases of equine herpesvirus type 1 continue to be reported throughout the West. Every day this week, updates from state farm agencies have increased the number of positive infection reports.

Confirmation of EHV-1 cases in Washington, Utah, Oregon and Colorado has put western states on high alert to be on the lookout for outbreaks of the potential killer of horses.

The Colorado Department of Agriculture confirmed eight cases of EHV-1, and 22 suspect cases.

One horse was euthanized after showing severe neurological signs associated with the disease and a second horse is under observation in a biosecure environment.

The Utah Department of Agriculture and Food is also investigating cases of EHV-1.

Utah authorities are concerned with reported cases of the disease in other states in horses which returned from the National Cutting Horse Association’s Western National Championships in Ogden, Utah, April 29-May 8.