Oct 29, 2025
3 min read
Populations of an invasive species of disease-carrying mosquitoes continue to spread throughout Northern California
A species that is susceptible to mosquito bites due to invasive disease is common in Northern California
WEARING AEGNITI OF AEDs carries diseases such as Chikungunya and Zika.
A population of invasive disease-carrying mosquitoes continues to spread throughout Northern California, including the San Francisco Bay Area, according to health officials.
Aedes Aegypti - known for its ability to transmit various diseases such as yellow fever, Chikungunya - Chikungunya.
This is the first time A. AELEGSPIPI has assessed the value of San Jose and is the Santa Corara District Science Director.
"This year in particular, we've had a lot of recognition in new parts of the county," Kelly said.
In the US, A. inegypti is commonly found in southern, southern, and Puerto Rico.According to the US center for disease control and prevention, it is usually found in tropical regions of the world, including countries in Europe, and southern Europe.
According to the California Department of Public Health, the species was first discovered in California in 2013 and has since been found in 27 counties — particularly in Southern California and the Central Valley.Earlier this month, Los Angeles County reported the first case of locally acquired dengue fever for the 2025 mosquito season — Kelly said.aegypti was the likely culprit.
According to health officials, the population has been steadily spreading across Northern California since spring. Egyptians, in particular, have the ability to "move with people," whether they follow them into their cars or homes or breed in extremely small containers.
In Santa Clara County, A. Aiypti has already been established, Kelly said.
"I think it's something that residents will notice because of the nuisance bites," he said.
According to the California Department of Health, the species has been linked to the spread of the dengue virus in California.
According to the fact that warm and humid insects thrive in the mosque of the world, climate change may play a role in the spread of the mosque population.Mosquitoes were discovered for the first time, and Antarctica is a region of the world where insects do not live.
In California, the climate has probably played "a very important role," but other factors have probably facilitated its spread in the Bay area, such as advanced insecticides resistance, Kelly said.
A. a Egypti is characterized by white bands on the legs, white spots on the body and stripes on the upper body.They are "aggressive biters," according to Santa Clara County.
In addition, Aedes aegypti mosquitoes can also lay eggs in flowerpots such as containers, pet bowls and backyards, which could further exacerbate spread, officials said.Residents are urged to dump standing water in their yards and clean out containers where rain may have accumulated.
"Everybody should dump and build a septic tank on their property once a week," Kelly said.
Roberto Barrera, chief expert in the CDC's dengue branch, said the strain "may pose a public health threat."
“Oversight of this issue is responsible for the spread of the virus affecting millions of people,” Bumi said in a statement.
California health officials are urging residents to immediately report bites that occur during the day and to document and submit black-and-white striped photos of mosquitoes.
