West Nile Virus Detected in Cache County Mosquitoes

Cache County, UT – The Cache Mosquito Abatement District (CMAD) has received confirmation from the Utah State Public Health Laboratory that mosquito samples collected in Cache County have tested positive for West Nile virus (WNV).

The infected mosquito pools were collected in the areas of Amalga and Trenton. In response, CMAD will continue its comprehensive surveillance and abatement efforts. The primary method of mosquito control remains larviciding, which targets mosquito larvae before they mature. Fogging (adulticiding) is conducted only at night when Culex mosquitoes—known carriers of West Nile virus—are most active.

In collaboration with the Bear River Health Department, CMAD encourages residents to take the following precautions to reduce mosquito exposure:

• Use EPA-registered insect repellent containing DEET, permethrin, picaridin, IR3535, or oil of lemon eucalyptus as directed.
• Eliminate standing water around your home (e.g., in buckets, tires, pet dishes, plant trays, and toys).
• Wear long sleeves and pants between dusk and dawn, when mosquitoes are most active.
• Maintain roof gutters, keeping them clear of debris.
• Clean or drain swimming pools regularly.
• Ensure all window and door screens are intact and in good repair.
• Trim tall grass and weeds, which serve as resting places for adult mosquitoes during daylight hours.

For ongoing updates and information about mosquito control efforts, please visit our website at  www.cachemosquito.gov or contact the CMAD office at 435-764-6839.