Neurologic Herpes on Ranch in Inyo County, California

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The Equine Disease Communication Center (EDCC) offers alerts about equine diseases that have been confirmed by reliable sources. The following information is from the EDCC. The following reports are in chronological order from most recent to oldest from previous reports.

Neurologic Herpes on Ranch in Inyo County, California

EHM has been confirmed in one horse with mild neurologic symptoms in Inyo County, California. Additionally, two febrile horses on the same ranch have been confirmed positive for the neurotrophic EHV-1 strain and neither horse is exhibiting any neurologic symptoms at this time. This is the neurologic strain, which is biologically distinct from the non-neurologic 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. These horses/mules 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. 

This is the neurologic strain, which is biologically distinct from the non-neurologic strain identified in all the LA County confirmed cases. The first affected horse was a 20-year-old Quarter Horse gelding that is part of a wintering pack string of 28 horses and four mules on an isolated, high desert ranch. These horses/mules have been placed under quarantine with no movement allowed in order to limit disease transmission. For more information go to https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html.

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The Equine Disease Communication Center works to protect horses and the horse industry from the threat of infectious diseases in North America. The communication system is designed to seek and report real time information about disease outbreaks similar to how the Centers for Disease Control and Prevention (CDC) alerts the human population about diseases in people.

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