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West Nile Virus Activity

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A single egg raft can produce as many as 300 to 400 larvae.

2008 West Nile Virus Activity

The Sacramento-Yolo Mosquito and Vector Control District's ongoing surveillance program has detected West Nile virus activity in Sacramento county as of May 9, 2008. Historical data for 2007 is available here.

West Nile virus positives for 2008:
    Sacramento
    County    		Yolo
    County    		Total
    Humans000
    Horses000
    Sentinel Animals000
    Mosquito Samples000
    Dead Birds101

Click here for a map of these locations

Below you will find the breakdown of West Nile virus activity

Humans tested positive for West Nile virus:
ReportedCountyCityZip Code

Horses tested positive for West Nile virus:
ReportedCountyCityZip Code

Sentinel animals tested positive for West Nile virus:
TestedCountyCityZip Code

Mosquito Samples tested positive for West Nile virus:
Click here to expand the full listing.


Dead birds tested positive for West Nile virus:
Click here to expand the full listing.



If you see a bird, particularly a crow or magpie, lacking signs of trauma that has been dead for less than 24 hours, please call 1-877-WNV-BIRD (1-877-968-2473) or report it online here. Crows and magpies are particularly susceptible to the disease, so they make excellent early warning sentinels for virus activity in our area.