West Nile Virus Activity 2025

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Mosquito Samples Tested: 59

Mosquito Samples Positive: 0

Positive Human Cases: 0

Positive Horse Cases: 0

About: Every week approximately 36 mosquito traps are set throughout the district to collect mosquitoes & guage mosquito densities. Once a trap is collected, they are brought back to the lab where the mosquitoes are counted & sorted by mosquito species found in the trap. The mosquito species that have the potential to carry vector-borne diseases commonly found in our area (primarily West Nile virus) are sent to the Oregon State University Veterinary Diagnostic Laboratory to be tested.