September 15, 2020 – West Nile Virus in Stanislaus, Butte, San Bernardino and San Joaquin County, CA

California Department of Food and Agriculture

Stanislaus County
Number Confirmed:
Age: 1; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 8/23/2020;
Clinical Signs: Ataxia, Falling Over, Mildly febrile; Confirmation Date: 9/3/2020; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Butte County
Number Confirmed:
Age: 13; Gender: Stallion; Breed: Mustang; Onset of Clinical Signs: 9/7/2020;
Clinical Signs: Recumbent, Unable to Rise, Weakness, Muscle fasciculations in shoulder; Confirmation Date: 9/10/2020; Horse Status: Euthanized; Vaccination Status: Unvaccinated;

San Bernardino County
Number Confirmed: 
Age: 3; Gender: Gelding; Breed: Buckskin; Onset of Clinical Signs: 9/3/2020;
Clinical Signs: Ataxia; Confirmation Date: 9/10/2020; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

San Joaquin County
Number Confirmed:
Age: 5; Gender: Mare; Breed: Friesian; Onset of Clinical Signs: 9/6/2020;
Clinical Signs: Difficulty Rising, lethargy, Mild Ataxia, Decreased Appetite, Delayed Menace; Confirmation Date: 9/14/2020; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;
Notes: For more information about WNV go to https://aaep.org/sites/default/files/Documents/Outside%20Linked%20Documents/DiseaseFactsheet_WNV.pdf;



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