Horse Tests Positive For EHV at Laurel

The Maryland Jockey Club was alerted to a horse displaying neurological abnormalities in its hind limbs Apr. 14, and the horse in question subsequently tested positive for Equine Herpesvirus (EHV), according to a Maryland Jockey Club release. As a precautionary measure, both the affected horse and another, which had been in close proximity to the affected animal but showed no symptoms, were relocated to an isolation barn at Laurel Park. Additionally, Barn 33, where the affected horse was housed, was promptly placed under quarantine.

The MJC, who alerted the State Veterinarian's Office, received confirmation that the initial nasal swab tested positive for EHV Monday evening. Further testing is scheduled for later this week.

A MJC issued statement reads: “In collaboration with the State Veterinarian's Office, we are in the process of developing a comprehensive quarantine protocol for Barn 33. This plan will allow horses in this barn to train separately from the general population and enable other barns to continue their regular racing and training activities.”

“It is imperative that all horses within our care are closely monitored for any signs of fever or symptoms consistent with EHV. Any horse registering a temperature above 101.5 degrees Fahrenheit, or exhibiting signs of incoordination, must be reported immediately to an MJC Veterinarian.”

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Equine Herpes Detected at Yard of Dr Richard Newland

The British Horseracing Authority has confirmed an outbreak of Equine Herpes Virus (EHV) at the yard of Grand National-winning trainer Dr Richard Newland in Worcestershire.
Movement restrictions have been placed on the yard to limit any future spread while further sampling is under way to determine the exact strain, which has yet to be confirmed but is thought to be EHV-1.
As of yet the BHA is not aware of any confirmed cases in any other yards but trainers and vets have been asked to be vigilant to clinical signs of EHV and advise twice daily temperature checks for all horses.
While there is a low risk of transmission in a bio-secure raceday environment, there is a slight chance the horses were infectious before showing symptoms so trainers with runners at Uttoxeter, Worcester and Southwell on June 2, 4 and 6 respectively have been asked to be especially alert to signs of the disease.
The most common strain of EHV is EHV-1 which causes respiratory disease, abortion in pregnant mares and neurological disease in horses of all ages and types. EHV-4 is also common which usually only causes low-grade respiratory disease but can occasionally cause abortion.
Once horses have been infected they can carry it silently and it can reactivate later in life.

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