West Nile virus (WNV) has been confirmed in horses in five Montana counties, state Livestock Department officials said Wednesday (Aug. 16).


Horses in Cascade, Glacier, Phillips and Yellowstone counties and a second horse in Flathead County were diagnosed recently, said Dr. Jeanne Rankin, assistant state veterinarian.


The first confirmed case, a 2-year-old stallion in Flathead County, had not been vaccinated and was euthanized on July 22.


Ages of the animals infected this year range from a 1-year-old filly to a 7-year-old stallion. None were vaccinated and all are recovering

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