The Colorado Department of Agriculture said last week that the number of quarantines since the vesicular stomatitis outbreak started is still increasing. However, the current number of quarantines in place has dropped. Forty of the 248 have been released, according to the Journal-Advocate.

The disease is spreading across the state, as well, with a new location in Morgan County under quarantine.

As of Sept. 3, 344 horses and seven cows in Colorado have tested positive for the virus, which causes oral blisters and sores. Since the outbreak, Larimer County has seen 65 quarantined locations; Boulder County has had 61, 10 of which have been released; and Weld County has had 51, with 29 released.

"The number of quarantined premises is actually going down in some counties as horses are healing and the quarantines are being released. We continue to see new cases so continue to ramp up your fly control. The State Veterinarian's Office is following up on reports of horse owners who have moved their horses out of a quarantined facility. If requirements of the quarantine are not followed, the Department will investigate, write citations for violations, and institute fines according to the Livestock Health Act in State statute," said State Veterinarian Dr. Keith Roehr in an article with Journal-Advocate. To learn more about the virus and its effects on horses and cow in Colorado, click here.