All stallions found to be positive to the serology test were quarantined while additional testing was conducted to determine if they in fact were carrier s of the arteritis virus. After a short delay, non-affected stallions were permitted to begin breeding in 1985. Stallions which were not vaccinated against the virus were monitored by serology testing every 14 days throughout the course of the breeding season to insure that the virus was not being spread. Stallions which were found to be shedding arteritis virus were permitted to return to breeding midway through the 85 breeding season. These stallions were heavily regulated by the Department of Agriculture to insure that they were bred only to qualified mares which were approved to be bred by the State Veterinarian s Office while following a stringent post breeding protocol consisting of isolation and quarantine.
Today there are no known thoroughbred shedding stallions standing at stud in Kentucky.
The Department of Agriculture requires that all thoroughbred stallions standing at stud in Kentucky be vaccinated annually against Equine Arteritis Virus. Stallions which are standing their first season in Kentucky are required to be tested prior to vaccination in order to determine that they are not affected with the arteritis virus. The Kentucky Department of Agriculture, working cooperatively with the Jockey Club maintains a stallion roster to insure that all stallions standing in Kentucky are properly vaccinated in accordance with the regulations.