The Greater Los Angeles County Vector Control District (GLACVCD/District) has confirmed the presence of dengue in Aedes mosquitoes in the county.
The dengue-positive mosquito was collected from surveillance traps in the community of Sun Valley, marking the first confirmed detection of dengue in the Aedes mosquito population in both the county and state. The district is working collaboratively with the LA County Department of Public Health (DPH) to deploy targeted mosquito control measures aimed at reducing the risk of disease transmission.
The DPH has confirmed seven infections of locally acquired dengue in LA County for 2025. These individuals were detected in the areas of La Puente, Sun Valley and North Hollywood. Although the risk for widespread dengue virus transmission in LA County remains low, everyone should take proactive steps to prevent mosquito breeding and mosquito bites.
“The district is conducting enhanced surveillance, community outreach and mosquito control efforts, including intensive door-to-door inspections and targeted treatments to reduce mosquito populations and limit further spread,” said Susanne Kluh, GLACVCD general manager. “While the district is working hard to control mosquitoes, we need residents to do their part by taking preventative steps, including using insect repellent and eliminating all standing water around their home to keep themselves and their families safe.”
The detection of dengue-positive mosquitoes indicates increased risk of human infection in the Sun Valley area. The DPH recommends that those who are experiencing symptoms or have been ill recently should visit their primary care providers and discuss dengue testing.
Sun Valley residents without access to a provider can get a nursing appointment for dengue testing at a Public Health Clinic. To make an appointment, people in the area can call the Public Health InfoLine at (833) 540-0473, seven days a week from 8 a.m. to 8 p.m.“Dengue can be prevented, and our most powerful tool is community action,” said Muntu Davis, M.D., MPH, LA County health officer.
Mosquito control is a shared responsibility, and residents must take an active role in reducing the threat of dengue in their neighborhoods by taking these additional steps:
● Eliminate standing water inside and outside your home once a week.
● Toss unneeded containers that can hold standing water.
● Use insect repellent with any of the following CDC-recommended active ingredients at 15% or higher: DEET, Picaridin, IR3535 or oil of lemon eucalyptus.
For more information regarding mosquito control, residents can contact the Greater Los Angeles County Vector Control District at (562) 944-9656 or visit GLAmosquito.org.