Outbreaks | Equine Disease Communication Center

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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West Nile Virus

Nevada County, CA

Outbreak Identifier: 5359

Alert ID: 2740

September 27, 2022

Confirmed Case(s) - No Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;
Age: 10; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 9/3/2022;
Clinical Signs: Shifting weight all 4 limbs, nonspecific discomfort, transient fever, mild bilateral pelvic limb ataxia, increased lip smacking.; Confirmation Date: 9/26/2022; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Comments: A 10-year-old unvaccinated Quarter Horse gelding in Nevada County has tested positive for West Nile Virus. This is the 10th case of equine WNV in California in 2022, additional information can be found on the CDFA Equine WNV webpage. For more information go to: WNV factsheet.

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