Mosquito-borne Disease Threats in Los Angeles County

To many people’s surprise, mosquitoes can transmit viruses to people and animals living in Los Angeles County. Our disease surveillance program, breeding source control efforts, and public education efforts help reduce the risk of mosquito-borne diseases.

Unfortunately, it is nearly impossible to get rid of every single mosquito since there are so many standing water sources, like buckets or plant saucers, in our communities. Most of the time, mosquito bites result in an itchy, allergic reaction. However, there are cases of people being infected with a mosquito-borne disease. Here are some of the diseases that affect LA County residents in our District.

West Nile virus is transmitted to humans, horses, birds, and other animals by the bite of an infected mosquito during blood feeding. A mosquito is infected by biting a bird that carries the virus. The virus is not spread through person-to-person contact but can be passed through blood transfusions.

To learn more about risk, symptoms and possible vaccines, click HERE.

View the latest West Nile virus statistics HERE.

Learn how to stay mosquito-free and reduce your risk of getting sick