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

Maricopa County, AZ

Outbreak Identifier: 4967

Alert ID: 2310

October 22, 2021

Confirmed Case(s) - No Quarantine

Source: Attending Veterinarian

Number Confirmed: 3;
Facility Type: Boarding Facility;
Age: 11; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/8/2021;
Clinical Signs: Ataxia, muzzle fasciculations; Confirmation Date: 10/14/2021; Horse Status: Recovering; Vaccination Status: Not Reported;

Age: 15; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 10/7/2021;
Clinical Signs: Anxious, muzzle fasciculations; Confirmation Date: 10/12/2021; Horse Status: Recovering; Vaccination Status: Vaccinated;

Age: 15; Gender: Gelding; Breed: Tennessee Walking Horses; Onset of Clinical Signs: 10/17/2021;
Clinical Signs: Ataxia, Facial Paralysis; Confirmation Date: 10/21/2021; Horse Status: Recovering; Vaccination Status: Not Reported;
Notes: For more information about West Nile Virus go to the WNV factsheet.

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