What is it?
The mosquito meter is a way for residents to monitor the risk of human West Nile infection. It is important to remember that West Nile virus, and the mosquitoes that carry it, are in and around Colorado each year. Residents are encouraged to use protective measures, regardless of meter level.
- DRAIN standing water on your property.
- DEET containing insect repellent when outside. (Picaridin, IR3535 or oil of lemon eucalyptus).
- DRESS in long sleeves and pants that have been sprayed with repellent.
- PROTECT by limiting exposure outside and check window screens.
The meter level is “high” this week.
On 8/15/2019 two traps in the Fruita area had mosquitoes test positive for West Nile virus elevating the meter from the normal range. This is the time of year when activity typically peaks, so it’s critical for residents to take precautions.
Human Cases of West Nile virus
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Partnership with Grand River Mosquito Control District
This data is collected in collaboration with our community partners at the Grand River Mosquito Control District. It is because of this partnership that we’re able to provide real-time data on mosquito activity in the county. We’re grateful for their support and partnership to bring this important data to the community. You can visit their website for more information.
The Mosquito Meter ranges from low to high using West Nile data collected from traps throughout Mesa County. In determining the level, a team at Mesa County Public Health considers: 1) the weather conditions including moisture and temperature 2) the number of mosquitoes trapped and how that compares to previous years 3) whether there have been any culex mosquitoes test positive for West Nile virus in the current season in our area and 4) if any confirmed human cases of West Nile virus have been reported in Mesa County. Keep in mind, this risk can vary significantly from one area of the Grand Valley to the other and West Nile is in and around Mesa County each year. Wearing repellent, and other protective measures are always the best choice, regardless of meter level. Multi-county data is collected and retrieved from the Colorado Electronic Disease Reporting System (CEDRS). Throughout the summer as new CEDRS data is updated, our team will evaluate and update the Mosquito Meter to reflect current conditions.
Culex Mosquito Counts Around the County:
This map shows the number of Culex species mosquitoes caught in mosquito traps around Mesa County for the most recent week. The Grand River Mosquito Control District (GRMCD) collects mosquitoes from each trap every week to keep track of which species of mosquitoes are showing up and where. There are 28 different types of mosquitoes present in Western Colorado, the Culex species are the only mosquitoes that cause disease (West Nile virus). The size of the circle changes based on how many Culex mosquitoes were caught in that trap the previous week. A bigger circle indicates more disease-causing mosquitoes were collected from that trap.