Vesicular stomatitis virus can cause blisters and sores in the mouth and on the tongue, muzzle, teats, or hooves of horses, cattle, swine, sheep, goats, llamas and a number of other animals. | Photo: Courtesy Wyoming State Veterinarian's Office

In its May 7 situation report, USDA Animal and Plant Health Inspection Service (APHIS) confirmed two newly infected counties in Arizona with equine cases of vesicular stomatitis virus (VSV). Cochise County had one newly confirmed positive equine premises. Gila and Pima counties, which are both newly infected, each had one confirmed equine premises.

Arizona was the second state with confirmed VSV cases in 2020, with one premises identified in Cochise County on April 22 and another on April 27. By April 29, a Pinal County premises was confirmed.

Premises with confirmed positive and suspect cases are quarantined for at least 14 days from the onset of lesions in the last animal affected on the premises