USDA Issues Updated VS Outbreak Situation Report

Outbreaks have been confirmed in Colorado, New Mexico, Texas, and Wyoming in addition to a recent case in Tillman County, Oklahoma.

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USDA Issues Updated VS Outbreak Situation Report
Vesicular stomatitis virus can cause blisters and sores in the mouth and on the tongue, muzzle, teats, or hooves of horses. | Photo: Courtesy Wyoming State Veterinarian's Office
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 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 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

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Written by:

Diane Rice earned her bachelor’s degree in agricultural journalism from the University of Wisconsin, then married her education with her lifelong passion for horses by working in editorial positions at Appaloosa Journal for 12 years. She has also served on the American Horse Publications’ board of directors. She now freelances in writing, editing, and proofreading. She lives in Middleton, Idaho, and spends her spare time gardening, reading, serving in her church, and spending time with her daughters, their families, and a myriad of her own and other people’s pets.

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