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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
Montgomery County, MD
Outbreak Identifier: 5134
Alert ID: 2501
March 16, 2022
Confirmed Case(s) - Official Quarantine

Maryland Department of Agriculture

Number Confirmed: 3;
Number Exposed: 44;
Facility Type: Farm;
Confirmation Date: 3/9/2022; Horse Status: Euthanized;
Notes: The Maryland Department of Agriculture today confirmed a horse in Montgomery County tested positive for Equine Herpesvirus (EHV-1) on March 9. The index horse was sent to the Equine Medical Center (EMC) in Leesburg, Virginia, for treatment and was later euthanized due to complications. Two other horses from the same barn have been sent to EMC for diagnosis, isolation and are currently under treatment. The Montgomery County farm has been placed on a hold order by the department, prohibiting movement on or off the farm until any exposed horses have been cleared for release. The horse was previously housed in an isolated barn with 44 other horses. The veterinary practitioner and stable are providing follow-up care to the horses on the farm. Possible links to the positive EHV-1 equine are actively being investigated. Owners are cautioned to monitor horses carefully, and should contact their private veterinarians to arrange for EHV-1 testing if a horse exhibits significant temperature elevations or neurologic signs. Veterinarians are required to report equine neurologic syndrome to the department by calling the Animal Health Program at (410) 841-5810. For more information about EHV-1 go to: EHV-1 factsheet. 
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