On 2nd July 2013 the Animal Health Trust confirmed an outbreak of Equine Herpes Virus-1 (EHV-1) neurological disease on a premises in Devon after two Thoroughbred mares had both been found recumbent on Friday 28th June 2013 and were later euthanased.
Positive diagnoses of EHV-1 infection were made in both mares by qPCR on nasopharyngeal swabs and moderate-high levels of antibody measured by complement fixation test (CFT).
The following day two further Thoroughbred mares developed clinical signs of ataxia, but are reported by the attending veterinary surgeon to be making recovery following corticosteroid treatment. There are approximately 180 in-contact horses on the premises in Devon and control measures, including horse movement restrictions have been implemented.
This outbreak is epidemiologically linked to the presumptive neurological EHV-1 outbreak reported to EVG on 28th June 2013 in Warwickshire (Midlands), as the affected Thoroughbred mare in that outbreak had moved from the Devon premises 16 days previously.
Nasopharyngeal swabs taken from the contact animals on the Warwickshire premises have today tested negative to EHV-1 by qPCR but further laboratory results are awaited from these animals as part of on-going disease control measures.
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