Although all VSV-affected premises had initially been released from quarantine in Arizona as of July 15, 2015, on September 14, 2015, the National Veterinary Services Laboratories (NVSL) in Ames, Iowa subsequently confirmed a finding of vesicular stomatitis virus (VSV) infection (New Jersey serotype) from an equine premises in Apache County, Arizona. One horse from the premises met the case definition of infection with compatible clinical signs and positive complement fixation antibody titer. Based on this confirmation, Arizona has been added back to the list of currently VSV-affected states.
Currently, there are ninety (90) affected premises remaining under quarantine in 7 states (Arizona, Colorado, Nebraska, New Mexico, South Dakota, Utah, and Wyoming).
As a result, horses from Arizona are not being allowed to enter Canada. This restriction will remain in place until the quarantine is lifted.
For more information, go to the USDA Vesicular Stomatitis web page