A new VSV-positive equine premises has been identified in Montezuma County, Colorado. VSV circulates annually between livestock and insect vectors in southern Mexico and only occasionally results in incursion into the U.S. The contagious virus is transmitted by biting midges and therefore is seasonal.
Source: The Horse, May 11, 2026. Link. There is no specific treatment for vesicular stomatitis. Best practices include implementing good biosecurity and treating affected horses with pain relievers, anti-inflammatories and supportive care as recommended by a veterinarian. Isolating all affected animals and placing the premises on immediate quarantine is required until all horses have fully recovered and no active lesions are present.
Image: Link.
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