California EHM and WNV

California reported confirmed equine cases of neurologic herpesvirus and West Nile virus.
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Los Angeles County and Solano County California map

A gelding at a boarding facility in Los Angeles County was confirmed with neurologic herpesvirus and a mare at a facility in Solano County was confirmed with West Nile virus.

The California Department of Food and Agriculture also confirmed one case of neurologic equine herpesvirus (EHV-1, also known as equine herpesvirus myeloencephalopathy or EHM) in Los Angeles County. The affected 17-year-old Standardbred gelding had onset of clinical signs on November 13 that included being afebrile, urine dribbling and unable to evacuate bladder. He was confirmed with neurologic herpesvirus on November 18. The vaccinated gelding was affected and alive at the time of this report.

A total of 66 horses were exposed at that boarding facility.

For more information on neurologic herpesvirus download this AAEP Fact Sheet.

The California Department of Food and Agriculture confirmed one case of West Nile virus (WNV) in Solano County on October 23. The 11-year-old Quarter Horse mare had onset of clinical signs on October 16 that included mild weakness in her hind end. The unvaccinated mare was affected and alive at the time of this report.

For more information about West Nile virus download this AAEP Fact Sheet.

Information for this report was provided by the Equine Disease Communication Center.

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