An examination of 1,450 horses stabled at Lone Star Park revealed no evidence of vesicular stomititis, a contagious disease that was discovered in three horses in southwest Texas.Veterinarians for the Texas Racing Commission conducted the examinations at Lone Star, which is hosting this year's Breeders' Cup World Thoroughbred Championships."Because Lone Star Park is hosting important national stakes races on Memorial Day and the Breeders' Cup...this October, it's only natural that we pay close attention to this case, no matter how isolated and remote it is," said Lone Star Park president Jeff Greco. "To cast fears aside, we asked the Texas Racing Commission to oversee these independent examinations so that horsemen around the globe could be assured that it's safe to bring their horse to Lone Star Park."VS apparently has not spread since the three cases were found May 19 in Balmorthea, Tex. Kentucky has banned the import of horses from Texas and the European Union this week announced horses shipping from the United States would require a negative VS test.