The California Department of Public Health West Nile Virus Website

Case Counts by County

WNV Activity by County
Printable Version
2017 | 2016 | 2015 | 2014
2013 | 2012 | 2011
2010 | 2009 | 2008
2007

2017-10-13		2017 YTD SLEV Activity Map
2017-10-13		Arbovirus Bulletin #28
2017-10-13		2017 YTD WNV Activity Map
2017-10-10		2017 US Arboviral Activity Update
2017-10-06		Arbovirus Bulletin #27
2017-09-29		Arbovirus Bulletin #25
2017-09-22		Arbovirus Bulletin #25
2017-09-15		Arbovirus Bulletin #24
2017-09-08		Arbovirus Bulletin #23
2017-09-01		Arbovirus Bulletin #22
		- view full list of Weekly Reports -

2017-10-11		2003-2017 WNV Case Summary
2017-10-11		2017 Human WNV Incidence Report
2017-02-08		2016 Human WNV Incidence Report
2016-03-21		2015 Human WNV Incidence Report
2015-03-09		2014 Human WNV Incidence Report
2014-08-12		2013 Human WNV Incidence Report
2013-07-22		2012 Human WNV Surveillance Report
2013-03-18		2012 Human WNV Incidence Report
2012-06-13		2003-2011 WNV Case Summary by County
2012-04-26		2011 Human WNV Incidence Report
		- view full list of Humans -

2017-10-13		Reported, Tested, Positive 2017
2017-10-13		Positive Counts by City/County for 2017
2017-10-13		Positive Species for 2017
2017-03-30		Reported, Tested, Positive 2016
2017-03-30		Positive Species for 2016
2017-03-30		Positive Counts by City/County for 2016
2016-02-29		Positive Species for 2015
2016-02-29		Reported, Tested, Positive 2015
2016-02-29		Positive Counts by City/County for 2015
2015-03-12		Reported, Tested, Positive 2014
		- view full list of Dead Birds -

2010-12-16		2010 Confirmed Equine Cases Report
2010-12-16		2010 Equine WNV Result Map
2010-05-26		2009 Equine WNV Result Map
2009-10-24		2009 Confirmed Equine Cases
2008-11-10		2008 Confirmed Equine Cases
2007-10-04		2007 Equine WNV Result Map

2017-03-08		2016 YTD WNV Activity Map
2017-01-17		2016 US Arboviral Activity Update
2012-08-22		2011 West Nile virus Activity in California
2012-07-11		1999-2010 Total WNND cases by year
2011-07-11		1999-2011 Reported WNV Disease Cases in Humans
2010-08-22		2010 West Nile virus Activity in California
2009-08-22		2009 WNV Activity by County
2009-01-21		2008 WNV Activity Map
2009-01-21		2008 WNV Activity by County
2008-12-16		2004-2008 Comparative Line Graphs of West Nile Virus Activity
		- view full list of Reports and Analyses -

The California Mosquito-borne Virus Surveillance and Response Program works to protect Californians from mosquito-borne viruses through environmental monitoring, laboratory testing, mosquito control, and public outreach.

Participating Agencies: California Department of Public Health | UC Davis Arbovirus Research and Training | Mosquito and Vector Control Association of California

Mosquito logo copyright www.FightTheBiteColorado.com. Used with permission.

Locate your local mosquito and vector control agency

As of Oct 13, 2017	2017	2016	5Y AVG
Counties	45	38	40
Human cases	315	326	356
Dead birds	463	1325	1499
Mosquito samples	3291	3448	2986
Sentinel chickens	287	324	400
YTD - Year to date corresponds to the same time last year or last five years. - view all 2016 YTD activity -

Weekly Report
10.13		Arbovirus Bulletin #28
10.13		2017 YTD SLEV Activity Map
10.13		2017 YTD WNV Activity Map
Humans
10.11		2017 Human WNV Incidence Report
10.11		2003-2017 WNV Case Summary
02.08		2016 Human WNV Incidence Report
Dead Birds
10.13		Positive Counts by City/County for 2017
10.13		Positive Species for 2017
10.13		Reported, Tested, Positive 2017
Mosquitoes
10.13		AMOR - EVS Week 40
10.13		AMOR - GRAVID Week 40
10.13		AMOR - NJLT Week 40
- view report archives -