The University of California Agriculture and Natural Resources announced on Mar. 26 that the invasive Aedes aegypti mosquito, known for transmitting diseases such as Dengue Fever, Yellow Fever, Zika Fever, and Chikungunya, has been detected in several cities within Alameda County. The presence of this mosquito is a concern due to its adaptability and potential impact on public health.
The detection of Aedes aegypti highlights the growing risk of mosquito-borne diseases expanding beyond their traditional tropical regions. Environmental changes and the mosquitoes’ ability to adapt have allowed them to thrive in new areas. The Alameda County Mosquito Abatement District (ACMAD) is responsible for large-scale abatement efforts but relies on community members to detect and report these mosquitoes.
Aedes aegypti females are particularly dangerous because they prefer biting humans during daytime hours and can reproduce both indoors and outdoors. Their eggs are small and can survive dry conditions until moisture allows them to hatch. Residents are encouraged to eliminate standing water around homes, use protective clothing, install fine-meshed screens on windows and doors, and apply EPA-approved repellents as recommended by ACMAD and UC Integrated Pest Management.
UC Agriculture and Natural Resources extends university research through educational programs across all 58 California counties, offering science-based information via workshops aimed at supporting environmental stewardship according to the official website. The organization manages Cooperative Extension services as part of the University of California system according to its official website. It also utilizes nine research centers representing diverse ecosystems throughout California according to its official website.
In addition, UC Agriculture and Natural Resources secures funding through public contributions according to its official website, conducts more than 33,800 educational events annually with over 18,400 volunteers involved according to its official website, promotes sustainable practices for resilient ecosystems according to its official website, and has gained recognition for linking research with community needs according to its official website.
Residents who notice increased mosquito activity or experience bites during daytime hours should contact ACMAD for identification assistance or abatement advice. Reporting dead birds is also encouraged since they may indicate West Nile virus transmission by other mosquito species.

