USDA Issues Updated VS Outbreak Situation Report
Since its last Situation Report on July 24, the United States Department of Agriculture reported vesicular stomatitis (VS) outbreaks in:

  • Colorado (31 new confirmed positive and 72 new suspect premises),
  • New Mexico (nine new confirmed positive and six new suspect premises),
  • Texas (eight new confirmed positive and 30 new suspect premises), and
  • Wyoming (one new confirmed positive premises).

Colorado

Colorado equine cases involve the following counties:

  • Adams County (one new confirmed positive and one new suspect premises);
  • Archuleta County (two new confirmed positive premises);
  • Boulder County (eight new confirmed positive [1 bovine] and 11 new suspect premises);
  • Jefferson County, new infected county (one confirmed positive premises);
  • La Plata County (27 new suspect premises);
  • Larimer County (12 new confirmed positive and 18 new suspect premises);
  • Mesa County, new infected county (five confirmed positive and two suspect premises);
  • Montezuma County (one new confirmed positive and five new suspect premises); and
  • Weld County (one new confirmed positive and eight new suspect premises).

The following previously VS-infected or suspect premises in Colorado have been released from quarantine: three in La Plata County, seven in Larimer County, and four in Weld County.

New Mexico

New Mexico equine cases include premises in the following counties:

  • Cibola County, new infected county (one confirmed positive premises);
  • Rio Arriba County (one new suspect premises);
  • San Miguel County, new infected county (one confirmed positive premises);
  • Santa Fe County (three new suspect premises);
  • Sierra County, new infected county (one confirmed positive premises); and
  • Valencia County (six new confirmed positive and two new suspect premises).

Texas

Texas equine cases involve the following counties and, in addition to affecting equines, the disease has spread to cattle:

  • Brown County, new infected county (one confirmed positive premises);
  • Bastrop County (18 new suspect premises);
  • Hays County (two new suspect premises);
  • Hood County (three new suspect premises);
  • Palo Pinto County, new infected county (two confirmed positive premises);
  • Parker County, new infected county (one confirmed positive premises);
  • Shackelford County (one new confirmed positive premises);
  • Somervell County (one new confirmed positive premises); and
  • Travis County, new infected county (two confirmed positive, seven suspect premises).

Quarantine was lifted at one previously VS-infected premises in Johnson County.

Wyoming

Wyoming experienced one new equine confirmed positive premises in Platte County.

“It is of utmost importance that livestock owners report VS occurrences and comply with hold or quarantine orders to limit the potential for disease spread in this VS outbreak,” said Colorado State Veterinarian Keith Roehr, DVM, in a statement.

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 veterinarians 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, (and) the most recent and largest VS outbreak occurred in 2015. 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.