In its June Situation Report, the USDA Animal and Plant Health Inspection Service (APHIS) identified two new Arizona premises with vesicular stomatitis virus (VSV). The newly affected premises are in Apache and Maricopa counties.
Since APHIS’s previous Situation Report (June 4), six Arizona premises have been released from quarantine in Apache, Cochise, Maricopa, Pinal, and Santa Cruz counties. Five Arizona premises are currently quarantined for VSV, all of which are in Apache and Maricopa counties.
Also since the June 4 Situation Report, five New Mexico premises (in Bernalillo, De Baca, Dona Ana, Grant, and Sierra counties) have been released from quarantine. No new cases have been confirmed in New Mexico and Texas, the other two states affected by VSV in 2020. No premises are currently quarantined in New Mexico; two premises remain quarantined in Kerr and McMullen counties in Texas.
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.
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.