Health authorities in Ensenada have placed 1,204 mosquito egg traps across four zones of the municipality as part of an ongoing surveillance program targeting the Aedes aegypti mosquito, the species responsible for transmitting dengue, Zika, and chikungunya.
Lesli Bianeeth Recio Sánchez, coordinator of the program under the Ensenada Health Services Jurisdiction, confirmed the network is permanent and covers both urban and rural communities. The ovitraps, small devices designed to attract egg-laying mosquitoes so health workers can monitor population levels, are distributed across the city of Ensenada (588 traps), Maneadero (444), El Sauzal (92), and El Zorrillo (80).
Maneadero Gets Heaviest Coverage
Maneadero, the agricultural valley roughly 15 miles south of downtown Ensenada on Highway 1, accounts for more than a third of all traps in the network. The area’s irrigation infrastructure and standing water from farming operations create conditions favorable for mosquito breeding. Health officials have historically flagged the valley as a concern for vector-borne disease transmission.
The traps function as an early warning system, not an eradication tool. When field teams collect eggs from the ovitraps, they can identify whether Aedes aegypti populations are growing in a given area and deploy targeted larviciding or fumigation before outbreaks occur.
Ensenada’s History With Mosquito-Borne Disease
Ensenada, located about 85 miles south of San Diego, has dealt with mosquito-borne illness before. In 2017, Mexican health officials confirmed local transmission of the Zika virus in the city, prompting the California Department of Public Health to issue a travel advisory for the region. The State Commission of Public Services of Ensenada (CESPE) has also previously applied larvicide to water pipes in coordination with ISESALUD, the state health agency, to reduce breeding sites.
The Aedes aegypti mosquito is most active during warmer months and breeds in small amounts of standing water, including flower pots, buckets, tires, and rain gutters. Residents and visitors can reduce risk by emptying any containers that collect water around their property and using EPA-registered insect repellent when spending time outdoors.
Ensenada’s semi-arid climate keeps mosquito populations lower than in tropical parts of Mexico, but rainy periods and irrigation runoff in agricultural areas like Maneadero provide enough standing water for the species to establish itself.
The program was first reported by Ensenada.net.