Detection of West Nile Virus-Positive Mosquitoes in San Jose Prompts Control Measures
San Jose has detected West Nile virus-positive mosquitoes for the first time this year, leading to targeted spraying and community health efforts to prevent the spread of this serious disease.
Mosquitoes found in San Jose have tested positive for West Nile virus for the first time this year, prompting immediate action from local health authorities. The Santa Clara County Mosquito and Vector Control District has announced plans to initiate targeted spraying treatments to reduce adult mosquito populations that carry the virus. While specific timings and locations of the spraying are yet to be disclosed, a treatment is scheduled for August 29 starting around 10 p.m., covering zip codes 95118, 95124, 95125, and 95136.
The district emphasizes that mosquito populations tend to rise during the warmer months of summer and early fall, leading to an increased risk of West Nile virus transmission. The control efforts involve the application of pesticides approved by federal and state environmental agencies, specifically using Zenivex, to ensure safety and effectiveness.
West Nile virus can cause a range of symptoms, including fever, muscle weakness, disorientation, joint pain, rash, vomiting, and in severe cases, paralysis. The virus poses a significant health threat, especially to individuals over 60 and those with certain medical conditions. There is no vaccine for prevention, which underscores the importance of preventive measures.
Health officials advise residents to eliminate standing water around their homes—such as in pet bowls, flower pots, and neglected pools—and to use approved insect repellents to avoid mosquito bites. Reporting stagnant water or green pools to local authorities helps control breeding sites.
Residents are encouraged to sign up for mosquito treatment alerts and to report sightings of dead birds, which can be an indicator of West Nile virus presence. Reports can be made via phone or online.
Taking swift action through mosquito control measures is vital in reducing the risk of West Nile virus infection and protecting community health.
Source: https://medicalxpress.com/news/2025-08-west-nile-virus-positive-mosquitoes.html
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