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

Ada County, ID

Outbreak Identifier: 5896

Alert ID: 3336

September 20, 2023

Confirmed Case(s) - No Quarantine

Source: State Department of Agriculture

Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Age: 7; Gender: Mare; Onset of Clinical Signs: 9/19/2023;
Clinical Signs: Suddenly found down and unable to rise yesterday late evening, was found in sternal position. Client attempted to administer mineral oil orally due to suspect colic. We were able to get the mare standing after several assisted attempts. Showed bilateral hind end weakness, mild hind end ataxia, somewhat hyper esthetic. Normal rectal temperature (99.9*F), good appetite and passing manure. No visible injuries except some scleral hemorrhaging. Occasional muscle fasciculations and would hold head/neck stretched out away from body. Not vaccinated this year, likely never vaccinated per owner. Mare is nursing a 4 month old foal and is possibly 2 months pregnant.; Confirmation Date: 9/20/2023; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

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