Test results on the last three horses remaining in equine herpes virus quarantine at Churchill Downs found that all traces of the virus are gone from their systems and all three have been cleared to rejoin the general horse population at the track.Steve Asmussen trains all three. The Kentucky Department of Agriculture conducted blood scans earlier in the week and reported that each horse tested negative. The end of the quarantine means that the horses may also resume racing as soon as possible. The three horses had not trained since June 11 when an earlier round of blood scans detected traces of the virus and the horses were ordered to remain in quarantine in the track's detention barn. Most of Asmussen's stable was cleared from quarantine that day and returned to regular training and racing on Sunday.
All horses affected by the quarantine were isolated and required to train in special sessions apart from the general horse population. Asmussen's barn was the last of three Churchill Downs stables to be cleared from the quarantine that was imposed in mid-May when the contagious equine respiratory virus was confirmed in horses in those facilities. The quarantine also covered horses trained by Paul J. McGee, Bill Cesare, and Ronny Werner. Two horses – unraced 2-year-olds trained by Cesare and Werner – were euthanized as a result of the virus.