Any virus in the genus Vesiculovirus (family Rhabdoviridae) that causes vesicular stomatitis, an acute disease of pigs and cattle that causes fever and blisters on the mouth and feet. Some forms of this virus can cause a mild, flulike illness in humans.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.