A barn at a New Orleans race course (Fair Grounds) was quarantined today, Dec. 26, because a 3-year-old filly tested positive for equineherpes-1 (EHV-1).

It may take 10 days to clear other horses trained by Dallas Stewart, who trains the filly, and Neil Howard, said Dr. Tom David, the equine medical director of the Louisiana State Racing Commission.

Stewart has 44 horses and Howard has 27 in the enclosure, track spokesman Lenny Vangilder said. Nasal swabs were taken to test all 71, he said. Howard said the horses in his stable all look fine.

The horses may not race until they are cleared, said Eric Halstrom, the Fair Grounds vice president and general manager of racing. The state agriculture department will decide when those horses may be moved, Vangilder said