Skip to main content

LATEST UPDATES: Tracking COVID-19 | Vaccines | Racial Injustice

Larvae Of ‘Yellow Fever’ Mosquito Found In Escondido

Photo credit: San Diego County

A "yellow fever" mosquito.

Larvae of a tropical mosquito, found locally for the first time last fall at Navy Base San Diego and Chula Vista, has been discovered in Escondido, the county Department of Environmental Health reported Thursday.

A resident called to report the Aedes aegypti larvae earlier this week, according to the department.

The Aedes aegypti, also known as the "yellow fever" mosquito, is capable of carrying carry tropical diseases like yellow fever, dengue fever and chikungunya — though the department cautions that there hasn't been an outbreak of yellow fever in the U.S. in more than 100 years.

The Aedes aegypti is black with white stripes. It was likely brought to the region by travelers and might have hitched a ride by car to the North County, according to the agency. That type of mosquito generally doesn't spread very quickly on its own, experts say.

The insect was found in southern areas of San Diego County in October, but no evidence of the species was seen again until last week, when one was located in Chula Vista — close to one of the original discovery sites.

"It's very important that we get the public to help fight to keep this mosquito out of the county by eliminating standing water," said Department of Environmental Health Director Elizabeth Pozzebon. "This includes inside your home. This mosquito will live and breed indoors."

The breed's preference for living indoors is one of the key differences from mosquitos normally found locally. The other is that it will feed during the daytime. The regular mosquitos bite around dusk and dawn.

County vector control teams have been putting up and monitoring traps for the Aedes mosquito in the areas where it has been found and handing out information to urge the public to be on the lookout for the pest.


San Diego News Now podcast branding

San Diego news; when you want it, where you want it. Get local stories on politics, education, health, environment, the border and more. New episodes are ready weekday mornings. Hosted by Anica Colbert and produced by KPBS, San Diego and the Imperial County's NPR and PBS station.

  • Need help keeping up with the news that matters most? Get the day's top news — ranging from local to international — straight to your inbox each weekday morning.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Curious San Diego banner

Want more KPBS news?
Find us on Twitter and Facebook, or sign up for our newsletters.

To view PDF documents, Download Acrobat Reader.