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Mosquito and West Nile Information

Positive Mosquito Sample Found on September 18, 2014

Free Mosquito Dunks!

The City of Rowlett has received several packages of Mosquito Dunks (BT Tablets) from Dallas County Health & Human Services to be distributed to Rowlett residents in an effort to help in controlling mosquitoes and West Nile Virus.  Rowlett residents may come to the Development Services Office located at 3901 Main Street, Monday through Friday, between 8 a.m. and 5 p.m. (except on Holidays).  One package, per week, per property is available at no charge to Rowlett residents who show proof of residence, while supplies last.

If you have any questions, please contact the Rowlett Development Services Office at 972-412-6125.

City of Rowlett Partnering with Dallas County for 2014 West Nile Virus Prevention Campaign

"Dallas County Health and Human Services strives to protect the health of the citizens of Dallas County through disease prevention and intervention, and through promotions of a healthy community and environment. This is done through assessment, community input education, disease monitoring, regulation, and health services that help control the spread of disease."

Mosquito traps were set in six (6) zones determined by Dallas County Health and Human Services. See attached map for zone locations.

In the event that the West Nile Virus is detected in mosquito samples, the following will occur:

  • Increased mosquito surveillance in areas of positive traps
  • Advise the public and emphasize source reduction, personal protection and disease symptoms
  • Ground-based spraying will occur within 24-72 hours (weather permitting) around positive trap zone
When ground spraying is to occur, it will be documented in the table below as soon as information is available.

 Date of Positive Sample Zone Number Date of Spray 
8/14/2014 RO2 8/14/2014, 8/17/2014, 8/18/2014
9/18/2014 RO1
9/19/2014, 9/21/2014

Results for Rowlett weekly mosquito testing may be viewed here:  WNV Lab and Mosquito Identification

What Can I Do?

Mosquito Proof. Remember the Best Offense is a Good D-fense.

  • Wear long, loose and light-colored clothing to avoid mosquito bites when outside.
  • Use insect repellent products with "DEET" or other EPA approved repellents and follow product instructions.
  • Get rid of ALL standing water.
  • Empty, remove, cover or turn upside down any containers that will hold standing water (bottles, cans, tires, buckets, flower pots etc.).
  • Change water in pet dishes, wading pools and birdbaths several times a week.
  • Cover trash containers so they will not collect water.
Dusk & Dawn
  • Stay indoors during dusk and dawn hours—when mosquitoes are most active.

West Nile Virus Information

West Nile Virus is a disease that is spread by the bite of a mosquito. Mosquitoes become infected when they feed on the blood from infected birds. The infected mosquitoes can then transmit West Nile Virus to humans and animals.

West Nile disease can vary in severity. People 50 years of age and older have the highest risk of severe disease.

  • Severe West Nile (Neuroinvasive Disease) infections can cause neurologic complications such as encephalitis. Symptons include headache, high fever, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, and paralysis. It is estimated that approximately 1 in 150 persons infected with the West Nile virus will develop a more severe form of disease.
  • West Nile Fever - It is estimated that about 20% of people who become infected with WNV will develop West Nile Fever. Symptoms include fever, headache, tiredness and body aches. Occaisionally a skin rash on the trunk of the body and swollen lymph glands will occur. While the illness may last only a few days, even healthy people have reported being sick for several weeks.

Mosquito season in Dallas County typically runs from May to October with peak activity in August. Residents should be on heightened alert during these months.

West Nile FAQ's


Is it contagious?

No. WNV is not spread through contact from person to person or from animal to person.

How is it diagnosed?
Diagnosis of WNV requires a special blood test. Anyone who experiences symptoms of severe WNV illness should see a physician as soon as possible.

What is the treatment?
There is no specific treatment for WNV infection. Patients receive supportive medical care and rehabilitation if needed.

What if I’m not experiencing any symptoms?
Most infected people will show no symptoms. Symptoms typically develop between 3 to 14 days after a mosquito bite.

For DCHHS West Nile Virus FAQs see attached sheet.

More Information and Links

For more information pertaining to mosquitoes and West Nile please visit the Dallas County website.

Report Mosquito Activity
Please be sure you give the correct physical address of the complaint, your name and contact information in case the Dallas County representative needs to get back with you for more information.

Center for Disease Control West Nile Virus Q&A

City of Rowlett News Releases 

4000 Main Street Rowlett, TX 75088