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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
Inyo County, CA
Alert ID: 388
December 10, 2016
No additional confirmed cases of EHV-1 or new febrile horses have been identified at this time. The neurotrophic strain of EHV-1 causing EHM has been confirmed in one horse with mild neurologic symptoms in Inyo County, CA. This horse continues to improve and is now negative to PCR diagnostic testing on nasal swab. Additionally, two (2) febrile horses were confirmed positive for the neurotrophic EHV-1 strain and neither horse is exhibiting any neurologic symptoms. This neurotrophic strain identified in Inyo County is biologically distinct from the non-neurotrophic strain identified in all the Los Angeles County confirmed cases. The affected horses are part of a wintering pack string of horses and mules on an isolated, high desert ranch have been placed under quarantine with no movement allowed in order to limit disease transmission. The investigation of this disease outbreak is continuing by CDFA staff. Enhanced biosecurity is in place and we appreciate the cooperation and assistance from owner and private veterinarian.
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