2016 West Nile Virus ActivityThe Sacramento-Yolo Mosquito and Vector Control District's ongoing surveillance program has detected West Nile virus activity in Sacramento or Yolo counties. Archived data is available for 2007 activity, 2008, 2009, 2010, 2011, 2012, 2013, 2014, and 2015.
West Nile virus positives total for 2016
Click here for a map of these locations
Sentinel animals tested positive for West Nile virus:
Mosquito Samples tested positive for West Nile virus:
Dead birds tested positive for West Nile virus:
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.