The California Horse Racing Board (CHRB) announced Thursday that all horses stabled at or en route from Turf Paradise racetrack, in Phoenix, Arizona, will be denied access to California racetracks and other facilities within the board’s jurisdiction. The move comes as a result of the California Department of Food and Agriculture’s (CDFA) determination that a horse at Turf Paradise was confirmed to have vesicular stomatitis (VS).

Horses from confirmed VS premises are not allowed by the CDFA into California.

In its advisory, the CHRB said that “horses previously stabled at Turf Paradise that already have entered CHRB-controlled facilities have been placed under special surveillance and health monitoring.”

In recent weeks VS has been confirmed in equids in New Mexico, Arizona, and Utah.

Vesicular stomatitis s a livestock disease that primarily affects cattle and horses. It occasionally affects swine, sheep, and goats. In rare cases, humans can also become infected when handling affected animals if proper biosecurity steps are not followed.

It is essential that veterinarians and livestock owners be on the alert for animals displaying clinical signs characteristic of the disease such as lesions in the mouth and on tongue, lips, nostrils, hooves, and teats. These blisters leave raw tissue that is so painful that infected animals generally refuse to eat or drink and may show signs of lameness. Weight loss sometimes follows.

While vesicular stomatitis can cause economic losses to livestock producers, it is a particularly significant disease because its outward signs are similar to those of foot-and-mouth di