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TCMVCD District Map

Vector control districts employ an integrated management program to reduce mosquito populations and keep the diseases they can transmit under control. Surveillance includes intensive field monitoring, laboratory testing, and research studies on the newly emerging and previously known mosquito-borne diseases. Control methods include a myriad of procedures. Among them are public education, the elimination of standing water, and the use of a variety of environmentally sensitive biological controls, including mosquito fish.

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May contain: person, human, animal, bird, mammal, and horse

West Nile Virus Transmission Cycle

Several species of Culex mosquitoes spread WNV when they bite. Culex mosquitoes are common in California. Culex mosquitoes usually feed on birds, which Culex mosquitoes usually feed on birds,are the main source of WNV for mosquitoes. These mosquitoes will also bite people and can spread WNV to them. People and other animals

Who is most at risk of becoming very sick from West Nile virus? People over the age of 60 years • People with weakened immune systems  • People with diabetes, kidney disease, or some other medical condition These groups should take extra precautions to avoid mosquito bites. See your doctor if you think you have WNV. »