The Horse

OCT 2018

The Horse:Your Guide To Equine Health Care provides monthly equine health care information to horse owners, breeders, veterinarians, barn/farm managers, trainer/riding instructors, and others involved in the hands-on care of the horse.

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Page 22 of 51 | The Horse October 2018 23 The Horse October 2018 23 | chronology of an outbreak that occurred earlier this year: a rash of equine herpesvirus-1 (EHV-1) cases impacting hundreds of horses competing at an equine event in Orange County, California. We'll share how the monthlong roller coaster affected these horses; their riders, trainers, grooms, and veterinarians; and event and state officials. Our sources will also explain the steps required to control disease and protect horses going forward. A Brief Overview of the Outbreak On Tuesday, April 10, a 17-year-old Thoroughbred gelding began showing signs of neurologic disease, in- cluding fever, ataxia (incoordination), and depression, while stabled at an Orange County equine facility for an event. His owner immediately reported these signs to the horse's veterinarian, who examined the horse and contacted event officials and state veterinarians. Enter Katie Flynn, BVMS, MRCVS, equine staff veterinarian for the California Department of Food and Agriculture (CDFA). One of her responsibilities involves responding in such situations to contain disease and minimize its impact. Working closely with facility management and own- ers, Flynn and CDFA colleagues made sure the first febrile, neurologic horse (i.e., the "index case") was immediately isolated at an off-site facility, and they collected appropriate samples for laboratory testing. EXPOSED

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