Researchers at the University of Pennsylvania School of Veterinary Medicine (Penn Vet) have successfully developed a new test to systemically detect the local administration of illicit, gene doping therapies in equine athletes. The findings from the novel study, supported in part by the Pennsylvania Horse Breeders Association (PHBA) and the Pennsylvania State Horse Racing Commission, are a significant breakthrough in the collective fight to advance the welfare and integrity of sport for both horses and humans.