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Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.



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Equine Herpesvirus- Respiratory
Los Angeles County, CA
Alert ID: 358
November 09, 2016
At the Los Angeles Equestrian Center, a horse that had been placed in the quarantined isolation area of the facility on Nov. 3rd due to an elevated temperature and initially tested negative on both nasal swab and blood for EHV-1, has subsequently tested positive on both nasal swab and blood for non-neuropathic EHV-1. Since this horse was originally moved to isolation from a barn on the facility that had not previously been identified with a confirmed EHV-1 case, the horse population under quarantine at LAEC was expanded to a total of three barns under quarantine. All horses under quarantine are required to have their temperatures taken 2X/day and any elevated temperatures reported to incident management. In addition, all horses in these barns are under enhanced and strict biosecurity protocols. Since issuance of the quarantine on November 3, 2016 a total of six horses displaying neurologic signs have been confirmed positive for Equine Herpesvirus Myelencephalopathy. One of the six horses was euthanized on November 3rd due to the severity of clinical signs. All other confirmed positive horses remain in quarantined isolation and are stable and responding to treatment. Four of the six confirmed positive horses participated in a horseshow in Las Vegas, NV on October 24, -29, 2016. At this time, no additional EHV-1 cases have been confirmed in horses that exhibited at the Las Vegas horse show. CDFA has confirmed that the host facility has taken biosecurity measures of thorough cleaning and disinfection of the show facility. CDFA Animal Health Branch veterinarians continue to monitor the quarantine and situation on-site and will provide additional updates as they become available.
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