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

San Joaquin and Merced Counties, CA

Alert ID: 1089

October 09, 2018

Source: California Department of Food and Agriculture

In the first week of October, the California Department of Food and Agriculture confirmed its 9th and 10th equine West Nile Virus cases for 2018. On October 1, 2018, a 6 year old Quarter Horse gelding with unknown vaccination status, in San Joaquin county, displaying neurologic signs was confirmed positive for West Nile Virus. The gelding was euthanized due to severity of neurologic symptoms. On October 4, 2018, a 2 year old vaccinated Quarter Horse mare in Merced county, displaying neurologic signs was confirmed positive for West Nile Virus. The mare is alive and recovering. For 2018, a total of ten (10) horses have been confirmed positive for West Nile Virus. The positive horses were located in Amador, Kern, Merced (2), Placer, Sacramento (2), San Joaquin, Shasta and Stanislaus counties. Five (5) horses were unvaccinated, two (2) horses had an unknown vaccine history, and three (3) horses were vaccinated. Five (5) horses died or were euthanized and five (5) horses are alive. For more information on California equine WNV cases for 2018 visit https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

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