One New VSV-Affected Premises Confirmed in Arizona
In its June 16 Situation Report the USDA Animal and Plant Health Inspection Service (APHIS) confirmed one new positive equine premises with vesicular stomatitis virus (VSV) in Maricopa County, Arizona. Since the previous Situation Report dated June 11, one VSV-affected premises Maricopa County has been released from quarantine.

Presently, officials have quarantined five premises in Arizona: one in Apache County and four in Maricopa County.

Premises with confirmed positive and suspect cases are quarantined and monitored by veterinarians for at least 14 days from the onset of lesions in the last animal affected.

VS 101

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. Lesions usually heal in two or three weeks.

Because of the virus’ contagious nature and its resemblance to other diseases such as foot-and-mouth disease, animal health officials urge livestock owners and caretakers to report these symptoms to their veterinarian immediately. Most animals recover with supportive care by a veterinarian.

“Vesicular stomatitis has been confirmed only in the Western Hemisphere,” APHIS said on its website. “It is known to be an endemic disease in the warmer regions of North, Central, and South America, and outbreaks of the disease in other temperate geographic parts of the hemisphere occur sporadically. The Southwestern and Western United States have experienced a number of vesicular stomatitis outbreaks.” According to Angela Pelzel McCluskey, DVM, APHIS’ equine epidemiologist, the most recent and largest VS outbreak in more than 40 years of recorded history occurred in 2019. Outbreaks usually occur during the warmer months, often along waterways.”

Some states and other countries might restrict movement of, or impose additional requirements for, susceptible animals from states having known VS cases. Before moving livestock, contact the state of destination for its requirements.