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West Nile fever, Daniels Counties

West Nile Virus confirmed in Cascade County

A WNV-positive sample of adult Culex tarsalis mosquitos was collected 2.5 miles southwest of the town of Vaughn on July 22nd, 2025.

Independent Record · 6d

Four pools of West Nile virus confirmed in Montana

State and local health officials confirmed four detections of West Nile virus in Montana on Tuesday. There are three pools of mosquitoes in Lewis and Clark County and one pool in Cascade County.

West Nile virus detected in Lewis and Clark County

Four mosquito pools have tested positive for West Nile, including three in Lewis and Clark County and one in Cascade County. Additionally, Sheridan, Custer, and Daniels Counties have each reported one confirmed case of the virus in horses, totaling three positive horses in Montana so far this season.

Montana Reports First West Nile Cases of 2025

West Nile virus has landed in Montana for 2025. Mosquitoes are more than a summer nuisance. Here’s what you need to know to stay safe this season.

The Missoula Current News5d

West Nile Virus detected in Montana

Health officials this week confirmed the first detection of West Nile virus in Montana this year and said activity appears to ...

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