With the discovery of more mosquitoes infected with the deadly West Nile virus, the Santa Clara County Vector Control District next week will spray areas of Saratoga and West San Jose to kill virus-carrying mosquitoes.
A truck-mounted fogger will spray the pesticide Zenivex in Saratoga on Tuesday night, and in West San Jose on Thursday night. Plans for the fogging follow the discovery of adult mosquitoes infected with the virus. Fogging in both cities will begin about 11 p.m. and last several hours.
The intent is to prevent human cases of West Nile virus, which has no cure and has potentially long-term effects.
"We're seeing record-breaking WNV levels," said Russ Parman, acting manager of the Vector Control District.
The Saratoga fogging area will center around Thelma and Beaumont avenues, in ZIP code 95070.
The West San Jose fogging area will center around Thrush and Wren drives, covering parts of ZIP codes 92125, 95136 and 95118.
Maps of the fogging zones are posted on SCCvector.org.
Earlier this week, the district sprayed areas of Santa Clara and Sunnyvale; in July, it sprayed parts of Cupertino, Campbell and San Jose, all after virus-carrying mosquitoes were discovered. In the East Bay, Livermore was sprayed after dead birds and mosquitoes in the city tested positive for West Nile. Infected dead birds also were discovered in five areas of Contra Costa County.
The virus, discovered in the state in 2003, causes flu-like symptoms including fever, headache and body aches, and can lead to significant neurological damage or death. There have been 4,039 known cases in the state and 147 deaths from West Nile, which is transmitted by bites from infected mosquitoes.
Officials urge people to eliminate standing water not only in pools and ponds, but also in flowerpots and planter bases, toys, cans, leaky water faucets and sprinklers, rain gutters, buckets and old tires.
Other recommendations include:
* Clean and scrub bird baths and pet-watering dishes weekly.
* Ensure doors and windows have tight-fitting screens.
* Limit outdoor activities at dawn and dusk, when mosquitoes that transmit West Nile are most active.
* When going out at dawn and dusk, wear long sleeves and long pants, and light colors. Apply insect repellent.
To report a potential mosquito-breeding source or for assistance with mosquito control, call 408-918-4770 or fill out a service request online at SCCvector.org.
For residents with questions, the district will connect a phone and voicemail line, 800-314-2427, the day before and the day of each fogging operation.
Bay City News Service contributed to this report. Contact Sharon Noguchi at 408-271-3775. Follow her at Twitter.com/noguchionk12.