Yellow fever mosquito detected in California

SACRAMENTO, Calif. — A mosquito capable of carrying deadly yellow fever, dengue and other diseases has been detected in California as vector control agents scramble to control its spread.

The bugs first were detected in the Central Valley communities of Madera and Clovis in June, and were detected again this week in the city of Fresno and in San Mateo County in the Bay Area in August.

They bite during the day and need only a teaspoon of water — less than in a saucer under a houseplant — to lay eggs to reproduce.

“If it gets away it will change the way we live in California. You may not be able to sit on your patio and enjoy a cup of coffee during the day without getting bit,” said Tim Phillips of the Fresno Mosquito and Vector Control District.

So far none of the mosquitoes trapped within a 2-square-mile infected area of Clovis have carried diseases. But officials warn that if the mosquito called Aedes aegypti bites someone infected with dengue, problems could arise as they have across southern Florida, where dozens of residents have been infected.

The mosquito also has been detected in Texas and Arizona.

“The nightmare scenarios is it gets established in California and then a mosquito bites someone with an imported case of dengue,” Phillips said.

The yellow fever mosquito adds to problems already facing county vector control agents statewide in the battle against the mosquito-borne West Nile Virus. So far 275 cases have been reported this year.

Scientists at UC-Davis and at Yale University are performing genetic testing on the tropical yellow fever mosquitoes to determine their country of origin. Preliminary results show they could be from Central America.

The dark mosquitoes with white markings and banded legs prefer to live near and feed on humans. They lay eggs in small containers just above the waterline. Even after the eggs dry out they can hatch when the container is refilled.

Health officials think this outbreak could have originated from eggs on containers imported into the country.

The Fresno detection came after a resident saw a vector control display last week at the county fair and reported daytime attacks. Likewise in Clovis a resident complained about unusually aggressive mosquitoes.

The mosquitoes have been trapped at around 100 sites in Clovis, where vector control agents are going door-to-door warning residents to empty all standing water. Officials working along with the California Department of Public Health are spraying the insecticide promethean in and around thousands of infested homes.

“It’s very difficult to control because of its biology,” said Steve Mulligan, who is working on the Clovis outbreak. “They like humans and will come inside the house. We’re trying hard to eliminate it.”

More in Local News

If vehicles crash and tumble, rescuers want to be ready

The Puyallup Extrication Team practiced with other fire departments on cars, SUVs and even buses.

Man arrested after stolen car crashes in Everett

The accident occurred in the 100 block of SE Everett Mall Way.

5-vehicle crash in Arlington kills 62-year-old woman

Medics had transported her to the hospital, where she later died.

2 men hospitalized after rollover collision on U.S. 2

Two men were taken to the hospital with minor injuries… Continue reading

Marysville police serve a warrant — across the street from HQ

A man who fled was taken into custody. Police were serving a warrant for alleged drug-related crimes.

Marysville man charged with stabbing wife who sought divorce

Nathan Bradford, 45, found divorce papers while going through the woman’s car.

Man on ferry accuses child of theft, allegedly pulls knife

The man was arrested, no one was hurt, and the ferry was delayed 30 minutes on its way to Mukilteo.

State is close but still not compliant in school-funding case

Lawmakers must act during the next legislative session to satisfy the state Supreme Court.

Dems say GOP tax plan doesn’t add up for everyone

Rep. Suzan DelBene’s amendments to restore deductions, which the bill does away with, were rejected.

Most Read