The District's primary goal is to protect public health by managing immature and adult mosquitoes so that they do not present a significant risk to our community. In the event that mosquito populations pose a threat or become a significant public nuisance, the District can and will readily respond by implementing the District's Mosquito and Mosquito-borne Disease Management Plan. This plan has been approved by the Sacramento-Yolo Mosquito and Vector Control District Board of Trustees. The District’s goal is to interrupt the disease transmission cycle among mosquitoes, humans and wildlife. The following outlines the District's response plan:

Level I – Normal Season

The District performs routine mosquito, mosquito–borne disease and public health pesticide efficacy surveillance activities. SYMVCD also attends community events, provides presentations and distributes outreach material to various organizations.

Level II – Dead bird and/or positive mosquito pool

A response is initiated when the District’s Microbiology Laboratory detects a mosquito-borne virus [i.e., West Nile virus (WNV), Western Equine Encephalomyelitis (WEE), St. Louis encephalitis (SLE)] or when the California Department of Health Services (DHS) notifies the District of a mosquito-borne virus from a dead bird(s) or mosquito pool(s) within the District’s boundaries.

Level III – Sentinel chicken/animal

A response is initiated when the District’s Microbiology Laboratory detects sera conversion to a mosquito-borne virus (i.e., WNV, WEE, SLE) in a sentinel chicken(s) or when DHS notifies the District of a mosquito-borne virus infected horse or other animal within the District boundaries.

Level IV – Locally acquired human case

A response is initiated when the County Public Health Laboratory or DHS officials notify the District that a human has locally acquired a mosquito-borne virus (i.e., WNV, WEE, or SLE) disease within the District’s boundaries.

Level V – Multiple Human Cases, Epidemic Conditions

A response is initiated when County Public Health Laboratory or DHS officials notify the District that multiple mosquito-borne virus (i.e., WNV, WEE, or SLE) infections have occurred in humans within a specific area or there is evidence that epidemic conditions exist. The epidemic area is defined as the geographic region in which human cases are clustered (incorporated city, community, neighborhood or zip code). The District continues to assess the public health risk associated with the mosquito-borne virus (i.e., WNV, WEE, or SLE) by completing the Mosquito-borne Disease Report.