Barn 20 at Laurel Park has been placed under quarantine until Jan. 30 by the Maryland Department of Agriculture after a horse stabled there tested positive for the equine herpesvirus (EHV1) on Friday. The horse in question is English Tudor, a 4-year-old gelding who has made nine starts in the maiden-claiming ranks. He has not been ill or displayed any of the neurological symptoms that can be associated with the herpesvirus, according to his trainer, Tony Aguirre. Since testing positive, he has been moved offtrack to a farm. English Tudor was tested for equineherpes because he had recently been at the New Bolton Center in Kennett Square, Pa., to be gelded.  On Jan, 16, another horse who had been at the New Bolton Center with colic, but who had been released Jan. 9, tested positive for equine herpes myeloencephalopathy (EHM), the neurologic disease caused by EHV-1. After that positive test, the New Bolton Center tested all of the horses under its care, and a second horse tested positive for EHV1. The center then reached out to the connections of all horses who had recently been at the clinic and recommended they be tested for the virus. Many horses are latently infected with equine herpesvirus but show no signs of the disease. During times of stress, an apparently healthy horse who carries the virus may test positive for EVH1. Symptoms of EVH1 include fever, nasal discharge, and lethargy. In serious cases, EHV1 can lead to EHM and neruological issues such as paralysis, seizures, and sometimes death. English Tudor had been trained by King Leatherbury, but while the horse was at New Bolton his owner decided to transfer the horse to Aguirre, and vanned the horse to his stable. Other trainers stabled in Barn 20 include John Salzman Jr., who trains the top Maryland-bred filly Limited View, Katherine Voss, and Linda Albert. None of the horses stabled in the barn will be allowed to train or race while the quarantine is in effect. Aguirre, who has a string of 10 horses, said he "feels terrible" about the situation and has apologized to the other trainers in his barn. "The horse was doing great," he said. "I walked him a day, shed-rowed him a few days, and had him in training. He was here for about 10 days. What a mess." English Tudor is scheduled to be retested for the herpesvirus by state officials next Tuesday. If the test comes back negative, the quarantine will be lifted, according to Sal Sinatra, president of the Maryland Jockey Club. "There are no sick horses on the grounds," Sinatra said. "This is all precautionary. We want to be careful with this." While the quarantine is in place, horses stabled at Parx Racing and Penn National who travel to Laurel will not be allowed to return. Trainers Lupe Preciado and John Servis, both of whom are based at Parx, have elected to run horses in the $100,000 Fire Plug Stakes on Saturday at Laurel. Their horses will either remain at Laurel or ship to a farm after the race. Horses stabled at Aqueduct, Fair Hill, and Charles Town are being allowed to race at Laurel and return home, according to Sinatra. Laurel has not allowed horses stabled at Belmont Park to ship in since a horse trained by Linda Rice tested positive for the herpesvirus at that track Jan. 9. The nine-race card at Laurel originally had 76 horses entered. The first race on the card, which had seven entrants, has been canceled due to five scratches. Two horses on the grounds were scratched and the connections of three from Parx and Penn National declined to ship in and were scratched. The race originally scheduled as race 2 will be the first race conducted Saturday. It will go off at its scheduled post time of 12:57 p.m. Of the remaining 69 entrants on the now eight-race card, 14 have been scratched, leaving an average of 6.87 runners per race. Sunday's card also will likely have more scratches than usual. Laurel's card for next Friday is scheduled to be drawn Sunday. The races for next Saturday, which include four stakes, will be drawn Wednesday. Sinatra is hoping English Tudor tests negative for the herpesvirus Tuesday and the quarantine will be called off prior to entry time Wednesday.