Published on November 7, 2025

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Vesicular Stomatitis Confirmed in Arizona 

Two cases of vesicular stomatitis New Jersey Virus (VSNJV) have been confirmed in Cochise County, AZ. The cases were confirmed positive by the National Veterinary Services Laboratories on Oct. 31 and were reported by the Equine Disease Communication Center in Alert # 4695  on Nov. 3. 

The last confirmed outbreak of vesicular stomatitis occurred from May 2023 through January 2024. 

Vesicular stomatitis is a viral disease of horses, donkeys, mules, cattle, swine and New World camelids that occurs in the Western Hemisphere. The disease is named for the characteristic vesicular lesions it causes in the form of blisters, crusts and ulceration of the lips, muzzle, nose, tongue, ears, sheath, teats, and/or coronary band. The virus is transmitted by biting midges and therefore is seasonal.

More information about the clinical signs, diagnosis, treatment, and prevention of vesicular stomatitis can be found HERE