Jayson Jacoby
The Baker City Herald

A third pool of mosquitoes trapped in Keating Valley has tested posted for West Nile virus.

The mosquitoes were trapped on Aug. 4, said Matt Hutchinson, manager of the Baker Valley Vector Control District.

Two other pools of mosquitoes trapped in Keating Valley on July 21 also were infected with the virus.

A pool of mosquitoes consists of 10 to 50 insects.

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