West Nile Virus

What is the City doing to monitor West Nile?

The City of Corinth has contracted with Vector Disease Control who is using an aggressive and scientific approach to control the mosquito populations by utilizing larvacide to manage breeding sites at the larval stage.  On a weekly basis, during mosquito season, Corinth utilizes gravid traps to capture mosquitos overnight.  The captured mosquitos are transported to Vector Disease Control in Richardson for species identification and testing for West Nile Virus. Those trap sites are as follows: 

  1. The Woods Park
  2. Meadowview Pond
  3. Community Park (drainage area between football and Corinth Parkway)
  4. Thousand Oaks Pond

Click here to view a map of the testing sites.
Test results are produced in the form of a weekly vector index report.  A vector index is a measure of infectivity that takes into account the following information:

  • Vector species composition- Key species carrying West Nile Virus in our region.
  • Vector species population density- Vector abundance relative to trapping effort.
  • Vector species infection rate- Proportion of vectors infected with West Nile Virus.

The City Manager is authorized to approve adulticiding (spraying) in the City of Corinth if the vector index reaches 4.5 or higher for any one area.  When triggering mechanisms are met for spraying, a minimum of two days advance notice of intent to spray will be advertised on electronic message boards near major intersections around the trapping site.  Information will also be posted on the City’s website, Facebook page, and Twitter account.  Application of the pesticide will be a .5 (1/2) mile radius of the selected site.

Chemical Information

When the City does approve fogging for West Nile, the chemical used is called Bacillus Thuringiensis.  Click on the link below to view the chemical label and the Material Data Safety Sheet (MDSD) for Bacillus Thuringiensis.  

Bacillus Thuringiensis MSDS

                                 Click here to view the City of Corinth Mosquito Policy. 

The City treats water that cannot be eliminated with a biological mosquito larvicide called Bacillus Thuringiensis Israelensis (BTI).  The Corinth Public Works Department offers BTI briquettes that residents can pick up, free of charge, to use in the mosquito control effort.  Each address will be limited to two (2) briquettes per month while supplies last.  The briquette will treat 100 square feet of surface water for 30 days.  To apply, simply drop the briquette in standing water.  Residents will be required to show their driver’s license or a current City of Corinth utility bill to prove Corinth residency.  You may pick up the briquettes at 1200 North Corinth Street Monday through Thursday during the hours of 8:00 AM to 5:00 PM and on Friday between the hours of 8:00 AM and 11:00 AM. You may want to call ahead to ensure we still have a supply of briquettes on hand before driving to the service center. The phone number for Corinth’s Public Works Service Center is 940-498-3249.