The Los Angeles County Department of Public Health has confirmed a case of locally acquired dengue in a resident in the City of Baldwin Park, who has no history of travel to areas where dengue is endemic. Cases of locally acquired dengue were previously confirmed by Long Beach and Pasadena in fall 2023. No additional suspected locally acquired cases have been identified at this time.
While the potential risk for widespread dengue virus transmission in Los Angeles County remains low, these cases highlight the presence of infected mosquitoes locally and underscore the importance of preventive measures to control the spread of this virus.
Dengue fever, transmitted primarily through the bite of infected Aedes mosquitoes, can cause flu-like symptoms including high fever, severe headache, pain behind the eyes, joint and muscle pain, rash, and mild bleeding. In severe cases, it may lead to dengue hemorrhagic fever or dengue shock syndrome, both of which require immediate medical attention.
Public Health is encouraging healthcare providers to be vigilant for dengue fever in patients with acute febrile illness and test for and report suspect cases of mosquito-borne diseases and to routinely discuss prevention strategies with patients and travelers.
Public Health is working with local vector control agencies, and its field teams are providing door-to-door information on dengue risk and mosquito bite prevention and control measures in the local area. In addition, the San Gabriel Valley Mosquito and Vector Control District has increased mosquito trapping for identification and testing and abatement operations to reduce the risk of additional spread in the affected neighborhood.
“This case further indicates that dengue fever is present in our community. While the likelihood of widespread transmission is low at this time, we must remain vigilant and prevent further cases through public education and mosquito control efforts,” said Muntu Davis, MD, MPH, Los Angeles County Health Officer. “Mosquitos thrive in hot weather, increasing the risk of bites and mosquito-borne diseases. People should follow these simple steps to reduce their exposure to mosquitoes and risk for mosquito bites: 1) Use insect repellent on you and your family; 2) Remove standing water outside your home where mosquitoes can lay eggs and breed; and 3) Use, install, or repair window and door screens to prevent mosquitoes from entering your home.”
“The San Gabriel Valley Mosquito and Vector Control District has acted as quickly as possible to enhance surveillance and perform mosquito control in the area,” said District Manager Jason Farned. “The District will continue its surveillance and control efforts, including additional backpack and truck-mounted mosquito treatments to reduce adult mosquito populations and mosquito breeding sources.”
