sentences:  James Gilkerson, President of the Australian Equine Veterinarians Association, said the horse racing and breeding industries could come to a standstill if horse flu took hold.John Messara, President of Australian Thoroughbred Breeders, said the industry would lose hundreds of millions of dollars in lost gambling revenue and stallion servicing fees.Federal Treasurer Peter Costello said "when you take into account breeders, trainers, jockeys and race meetings the outbreak will affect the economy."