07/18/2002 11:00PM



The Livestock Disease Diagnostic Laboratory in Lexington, Ky., has confirmed a case of Potomac Horse Fever in central Kentucky in the death of a Thoroughbred filly. Samples from the filly, who was euthanized, tested positive for the disease, which is caused when horses ingest parasite-infected insect larvae in freshwater ponds, streams, or rivers. . . . Shares in Magna Entertainment and Mountaineer Gaming were two of the worst hit among racetrack stocks in Friday's broad sell-off. Magna dropped 39 cents, or 7 percent, to $5.45, making its loss for the week 80 cents, while Mountaineer fell 66 cents, or 5 percent, to $12.55.