2013 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. Archived data is available for 2007 activity, 2008, 2009, 2010, 2011, and 2012.

Download a PDF of the West Nile Risk Assessment for 6/17/2013

West Nile virus positives total for 2013
Sacramento
County
Yolo
County
Total
Humans101
Horses000
Sentinel Animals000
Mosquito Samples808
Dead Birds314

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:
ReportedCounty
05/30/2013Sacramento

Horses tested positive for West Nile virus:
ReportedCounty

Sentinel animals tested positive for West Nile virus:
TestedCountyCityZip Code

Mosquito Samples tested positive for West Nile virus:
CollectedCountyCityZip CodeSpecies (# of Mosquitoes in Trap)
06/04/2013SacramentoCarmichael95608Cx pipiens (44)
06/04/2013SacramentoCarmichael95608Cx pipiens (11)
06/04/2013SacramentoSacramento95822Cx tarsalis (3)
06/04/2013SacramentoSacramento95822Cx tarsalis (1)
06/07/2013SacramentoSacramento95815Cx pipiens (28)
06/07/2013SacramentoSacramento95831Cx pipiens (15)
06/07/2013SacramentoSacramento95831Cx pipiens (29)
06/11/2013SacramentoIsleton95641Cx pipiens (29)

Dead birds tested positive for West Nile virus:
CollectedCountyCityZip CodeSpecies
05/31/2013SacramentoWilton95693American Crow #13-1076
05/31/2013SacramentoSacramento95815American Crow #13-1082
06/05/2013SacramentoSacramento95823American Crow #13-1167
06/11/2013YoloDavis95616Western Scrub-Jay #13-1322


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.