Animal Health Officials Confirm WNV in Montana Horses

Horses residing in Musselshell and Lake Counties tested positive for WNV.

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WNV in Montana Horses
WNV is transmitted to horses via bites from infected mosquitoes. | Photo: iStock

Montana Department of Livestock officials confirmed the state’s first reported cases of equine West Nile virus (WNV) state for 2018. They’ve confirmed WNV in Montana horses residing in Musselshell and Lake Counties.

This follows WNV detection in mosquito surveillance pools in Cascade, Hill, and Lewis and Clark Counties. Montana typically sees WNV cases through late summer and into fall. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

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Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

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