Maryland EHV-1 case ends in euthanasia at Anne Arundel barn

A 19-year-old Thoroughbred gelding at a boarding facility in Anne Arundel County, Maryland, tested positive for equine herpesvirus-1 on March 9 and was euthanized, according to an EDCC Health Watch report published by Equus on March 27. One additional horse was considered a suspected positive, and 29 horses were identified as exposed at the facility. The case lands in the context of a broader multistate EHV-1 period that prompted Maryland to tighten equine movement rules earlier this year before lifting its temporary intrastate CVI requirement on February 1. (equusmagazine.com)

Why it matters: For equine veterinarians, this is another reminder that fever-only horses can sit upstream of more serious neurologic disease, and that boarding barns remain high-risk settings when horses from multiple sources commingle. USDA guidance for EHV-1 incidents emphasizes rapid isolation, movement controls, close monitoring of exposed horses, and practical biosecurity steps such as limiting shared equipment, traffic, and horse-to-horse contact. AAEP guidance also notes that neurologic EHV-1 should be approached as a worst-case contagious event until proven otherwise. (aphis.usda.gov)

What to watch: Watch for whether Maryland reports additional positives linked to the Anne Arundel exposure group, or whether the case remains contained to this single facility. (equusmagazine.com)