Invasive Aedes Aegypti Mosquitoes Detected in San Jose
Invasive Aedes aegypti mosquitoes, first detected in the county in large numbers last year, have been found again in a neighborhood where they were detected last year. This reappearance means the mosquito’s eggs successfully survived the winter and are hatching now that the weather is getting warmer.
This mosquito is an aggressive daytime bitter and can spread diseases like dengue and Zika. These diseases aren’t in the county right now, but finding this mosquito again is a serious health concern because it means the mosquito is successfully surviving and reproducing in our community, increasing the risk of these diseases.
We are monitoring the area to see how many of these mosquitoes survived the winter and how large their population is now. Depending on our findings, we may soon begin wide area larvicide spraying treatments to protect public health.
The public plays a critical role in controlling the spread of this mosquito. It's important for the community to do the following:
- Let our licensed technicians access your property do the important job of checking for mosquitoes and controlling them as needed.
- If you are worried about privacy, please know our staff is only allowed to set traps, check for mosquitoes, and control mosquitoes that are found. They are not allowed to do anything else on the property. They will have clear ways to identify themselves as district employees.
- Report day-biting mosquitoes immediately by calling (408) 918-4770, emailing [email protected], or submitting a report online at vector.santaclaracounty.gov/ReportMosquitoes (you can also send photographs of dead or live mosquitoes with black and white stripes to the same email address.)
- Dump out any containers that are filled with water and clean them by scrubbing them with hot, soapy water or a diluted bleach solution. Instructions on how to properly clean out containers for mosquitoes can be found here.
Additional Resources:
Stay Informed:
- Subscribe to our general mosquito alerts to stay informed about invasive mosquito detections and mosquito control treatments happening in the county.
- Subscribe to the County's emergency alert system, AlertSCC, to receive specific neighborhood notifications about invasive mosquito detections and mosquito treatments happening in your community.