Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

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Equine Herpesvirus- Neurologic

Anne Arundel, MD

Outbreak Identifier: 4606

Alert ID: 1999

March 20, 2021

Confirmed Case(s) - Official Quarantine

Source: Maryland Department of Agriculture

Number Confirmed: 2;
Facility Type: Racetrack;
Notes: Update 3/20/2021; Original Alert ID#-1976: The Maryland Department of Agriculture has confirmed additional cases of EHV-1 at Laurel Park Racetrack. A second horse in the same barn as the index horse began displaying clinical signs of EHV-1 and was confirmed positive on March 15. That horse did not respond to treatment and has been euthanized. Following the second positive case, MDA Animal Health officials tested the remaining 20 horses housed in the same barn as the two positive horses on March 17. Those tests returned six positive results from asymptomatic horses. All positive horses have been removed from the barn and placed in isolated quarantine offsite. The original hold order on the four impacted barns has been reset, and horses in the index barn will be retested prior to releasing the order. The department continues to work closely with Laurel Park Racetrack and Maryland Jockey Club to ensure that daily operations are able to continue as safely as possible with minimal disruption.

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