West Nile Virus Detected in Sunnyvale Mosquitoes; Treatment Planned
West Nile virus-infected mosquitoes detected in Sunnyvale, Santa Clara County, with mosquito control treatment scheduled.
San Francisco Oakland San Jose, CA, September 24, 2026 —
Mosquitoes testing positive for the West Nile virus (WNV) have been detected in Sunnyvale, according to information released regarding Santa Clara County’s mosquito surveillance program. This detection indicates the presence of the virus in the local mosquito population, prompting public health officials to schedule mosquito control treatments.
West Nile virus is a disease transmitted to humans primarily through the bite of an infected mosquito. While many people infected with WNV show no symptoms, a subset can develop serious neurological illness. The virus is carried by certain species of mosquitoes, which become infected after feeding on birds that carry the virus. These mosquitoes can then transmit the virus to humans and other animals.
The specific species of mosquitoes found to be infected, the exact locations within Sunnyvale where the positive samples were collected, and the timeline for the detection were not provided in the initial summary. However, the identification of WNV in local mosquitoes signals a need for increased vigilance and preventative measures.
In response to these findings, Santa Clara County has scheduled mosquito control treatments. The nature of these treatments, including whether they will involve larvicides or adulticides, the specific areas targeted for treatment, and the exact dates or timeframe for these operations, were not detailed. Public health advisories typically recommend that residents take steps to protect themselves from mosquito bites, such as using insect repellent, wearing long sleeves and pants, and ensuring windows and doors have intact screens.
Further information regarding the specific mosquito control efforts and any public health recommendations is expected to be released by the relevant county authorities. Residents are encouraged to stay informed through official channels. The contractor responsible for the treatment was not specified.
Story summarized from the original created by KTVU.Staff@fox.com (KTVU Staff) on www.ktvu.com, see more information here.
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