Mosquito-Borne Diseases

Collin County collaborates with local cities to conduct surveillance activities for West Nile Virus and other mosquito-borne diseases such as Chikungunya, Zika and Dengue. Currently there are no locally acquired cases of Chikungunya, Zika or Dengue in Collin County.  Mosquito bite prevention is the best way to prevent the spread of mosquito-borne diseases.

Please visit Zika in Texas to obtain additional information for the state of Texas. Zika is a virus that is primarily spread through mosquito bites. Transmission may also be spread from mother to child during pregnancy. Spread of the virus through blood transfusion and sexual contact have also been reported.

Most people infected with the virus generally display mild or no symptoms. Those that develop symptoms may display mild illness that can last several days or up to several weeks. The most common symptoms of the Zika virus are fever, rash, joint pain, and conjunctivitis (red eyes).

Pregnant woman or woman that may become pregnant should be cautious in active Zika areas. The virus has been linked to the birth defect microcephaly, a condition where a baby's head is much smaller than expected and may cause developmental delays.

Most cases in Texas are related to people infected through mosquito bites while traveling to areas where Zika is being spread. Travel guidance is available through the Center for Disease Control (CDC) website.

Questions about testing for the Zika virus? Additional information is available on the CDC's Testing for the Zika Virus site and/or please visit: Zika in Texas for the most current information available on Zika testing procedures.

Please visit our West Nile Partners page to find more information about the activities of area cities and municipalities.

                                                            Arbovirus Activity Report

                                                       Arbovirus Activity Report

Mosquito Prevention and Education

Protect Yourself

  • Avoid mosquito bites
    • Wear long sleeves and long pants
    • Use insect repellent approved by the Environmental Protection Agency (EPA)
  • Sexual transmission of Zika virus can occur
    • For individuals who have travelled to an area currently experiencing Zika virus transmission practice safe sex.

Protect Your Home

  • Remove standing water from your property
  • Repair any broken screens, windows and doors to keep mosquitos outside
  • Keep vegetation trimmed
  • Report dead birds your City Health Department (dead birds may indicate WNV is circulating)


Additional information related to mosquito prevention is available here.

Basic Information That You Can Read, Print and Share

Mosquito Bite prevention US.pdf

Dengue Virus.pdf

West Nile Virus.pdf


Helpful Links

Chikungunya Virus



West Nile Virus

Zika Virus