2023 Mosquito SurveillanceIn December 2023, there were distinct fluctuations of various mosquito species when compared to their five-year December averages. Culex pipiens, a species known for its widespread distribution, exhibited a decreased average count of 0.744, notably lower than its five-year average of 1.557. Conversely, Culex tarsalis displayed a higher count of 0.103 compared to its five-year December average of 0…
Aedes aegypti SurveillanceThe District conducts intensive surveillance for invasive Aedes mosquitoes. The surveillance program mainly targets two mosquito species, Aedes aegypti and Aedes albopictus, which have been spreading throughout California over the last several years.
West Nile Virus SurveillanceThe District’s West Nile virus surveillance program reports several types of positive West Nile virus results, including dead birds, mosquito samples (“pools”), sentinel chickens, and human cases.
