2018 West Nile Virus Activity

The Sacramento-Yolo Mosquito and Vector Control District’s ongoing surveillance program has detected West Nile virus activity in Sacramento or Yolo counties to date in 2018. Archived data is available for 2007 activity, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, and 2016.


For Human and Equine cases, please visit westnile.ca.gov.

West Nile virus positives total for 2018

Sacramento
County
Yolo
County
Total
Sentinel Animals 0 0 0
Mosquito Samples 13 0 13
Dead Birds 8 0 8

Below you will find the breakdown of West Nile virus activity


Sentinel animals tested positive for West Nile virus:

Tested County City Zip Code

Mosquito Samples tested positive for West Nile virus:

Collected County City Zip Code Species (# of Mosquitoes in Trap)
05/30/2018 Sacramento Elk Grove 95624 Cx tarsalis (50)
06/07/2018 Sacramento Elk Grove 95757 Cx pipiens (50)
06/15/2018 Sacramento Rancho Cordova 95670 Cx pipiens (39)
06/19/2018 Sacramento Sacramento 95822 Cx pipiens (50)
06/19/2018 Sacramento Sacramento 95832 Cx pipiens (28)
06/19/2018 Sacramento Sacramento 95822 Cx pipiens (45)
06/19/2018 Sacramento Sacramento 95815 Cx tarsalis (9)
06/19/2018 Sacramento Sacramento 95815 Cx pipiens (38)
06/19/2018 Sacramento Sacramento 95660 Cx pipiens (50)
06/19/2018 Sacramento Sacramento 95842 Cx pipiens (13)
06/19/2018 Sacramento Sacramento 95835 Cx pipiens (50)
06/19/2018 Sacramento Sacramento 95831 Cx pipiens (50)
06/19/2018 Sacramento Sacramento 95831 Cx pipiens (50)

Dead birds tested positive for West Nile virus:

Collected County City Zip Code Species
05/23/2018 Sacramento Sacramento 95815 American Crow #18-379
05/31/2018 Sacramento Sacramento 95822 American Crow #18-456
05/31/2018 Sacramento Elk Grove 95624 California Scrub-Jay #18-463
06/06/2018 Sacramento Sacramento 95825 Yellow-billed Magpie #18-572
06/13/2018 Sacramento Sacramento 95815 American Crow #18-624
06/13/2018 Sacramento Fair Oaks 95628 California Scrub-Jay #18-626
06/20/2018 Sacramento Elk Grove 95624 California Scrub-Jay #18-754
06/20/2018 Sacramento Sacramento 95831 American Crow #18-742

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.