Mosquitoes tested positive for West Nile in Mesa County

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MESA COUNTY, Colo. — Mosquitoes from two trap locations in the Fruita area of Mesa County have tested positive for West Nile virus.

The Grand River Mosquito Control District collected the mosquitoes on August 5th. The types of mosquitoes that tested positive were identified as Culex species, which can transmit West Nile virus to people. 

There have been no human cases of West Nile virus in Mesa County so far in 2019.

This is the first confirmed West Nile activity in mosquitoes in Mesa County this year.  However, this is the time of year when activity typically peaks, so residents must take precaution.

The best way to avoid getting West Nile virus is to avoid being bitten by mosquitoes. When you are spending time outdoors, these are some easy steps to  protect yourself:

  • Use an EPA-approved insect repellent effective against mosquitoes. Look for one that contains DEET, Picaridin, IR3535, 2-undecanone, or oil of lemon eucalyptus.
  • Dress in long sleeves and pants when in areas where mosquitoes are active.
  • Avoid being outdoors at dusk and dawn; this is when mosquitoes are most active.
  • Drain and remove sources of standing water on your property.

In order to help you take precaution, Mesa County Public Health launched the Mosquito Meter this summer. The Mosquito Meter is a way for residents to monitor the risk of human West Nile virus infection. Because two trap locations have confirmed West Nile virus in mosquitoes, the meter has been elevated to high.

There were two confirmed human cases of West Nile virus in Mesa County last year. The first case was reported in August, and the second in September of 2018.

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