[CLSTR]
< Back to situation

[REVISION HISTORY]

Equine disease outbreaks in North America

Updated 2 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-03 19:01 UTC → 2026-09-09 20:08 UTC · added removed

Multiple equine disease outbreaks have been reported across North America. In late August, Washington reported a case of strangles in King County, prompting a self-imposed quarantine at a private facility. Simultaneously, the USDA identified presumptive positive cases of vesicular stomatitis (VSV) in Colorado, specifically in La Plata and Montezuma counties. This contributed to a total of 45 VSV-affected premises identified across Arizona, Colorado, and New Mexico, all involving the vesicular stomatitis New Jersey virus serotype. By early September, reports of strangles expanded to Florida and Ontario, Canada. Florida officials confirmed two cases in Highlands and Levy counties, marking the 21st and 22nd confirmed cases in the state for 2026. In Ontario, a four-month-old colt in Grey County tested positive for the bacterial infection. On September 1, the Florida Department of Agriculture and Consumer Services reported a strangles infection at a private facility in Marion County. One County, where one horse tested positive, resulting in the exposure of positive and seventeen other horses. This incident marks the 23rd confirmed case of others were exposed. On September 8, new strangles in Florida for 2026. Affected animals cases were confirmed in these regions have been placed under quarantine to manage Washington and Wisconsin. In Whatcom County, Washington, a horse transported from Texas tested positive; the spread of animal is recovering while two other horses exposed at the highly contagious Streptococcus equi bacteria. private farm are under quarantine. In Dane County, Wisconsin, a 13-year-old Quarter Horse gelding at a boarding facility tested positive after exhibiting fever, cough, and nasal discharge. The horse is currently in recovery.

Versions

  1. 2026-09-09 20:08 UTC Equine disease outbreaks in North America
  2. 2026-09-03 19:01 UTC Equine disease outbreaks in North America
  3. 2026-09-01 18:10 UTC Equine disease outbreaks in North America

Only revisions since CLSTR began indexing content versions appear here. Select a version to see what changed compared to the one before it.