The Equine Disease Communication Center confirmed on March 9 that there are two unrelated cases of equine herpesvirus myeloencephalopathy in Maryland.
A 3-year-old Thoroughbred stabled at Laurel Park Racetrack in Anne Arundel County developed symptoms on March 6 and was admitted to the Marion duPont Scott Equine Medical Center in Leesburg, Virginia, where it was put in isolation. The horse is responding to treatment.
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Four barns at Laurel Racetrack are on a hold order, prohibiting horses from entering or exiting the property. No other horses have displayed symptoms.
A second, unrelated case of EHM was reported at a private barn in Cecil County on March 5. The horse did not respond to treatment and was euthanized March 6. That barn has also been placed on quarantine.
