An unraced Thoroughbred filly in training with Eddie Truman and stabled at Santa Anita Park, was feverish for over three days and then developed neurological symptoms on the fourth day. Biosecurity safeguards and procedures were then executed. The California Department of Agriculture was immediately notified that there was a probable case of EHV-1 at Santa Anita.
My Sugar Sugar was euthanized once she displayed the neurological symptoms.
According to a statement by the California Horse Racing Board (CHRB) about this case, all biosecurity procedures were properly performed and appropriate notifications made.
The diagnostic tests run on tissue from My Sugar Sugar at the University of California-Davis confirmed that the filly was positive for EHV-1.
Equine herpesvirus carries an average incubation time of four to seven days. Mostly, the great majority of horses incubate from three to eight days. On rare occasions, the incubation period may take as long as 14 days.
All horses at Santa Anita are being closely monitored at this time. However, no other horses have displayed any fever, illness or suspicious symptoms. There have been no other reported cases of EHV-1 at Santa Anita.
Everyone in the Santa Anita stables are on high alert. They have been advised to be wary about any symptoms, and to notify the California Horse Racing Board official veterinarian as early as possible if they suspect any illness.
The CHRB website contains links to information about EHV-1, control measures, and ways to help prevent its spread:
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