Case Counts by County

CountyDead birds
Alameda54
Alpine-
Amador-
Butte11
Calaveras-
Colusa4
Contra Costa25
Del Norte-
El Dorado1
Fresno8
Glenn4
Humboldt2
Imperial-
Inyo-
Kern3
Kings2
Lake12
Lassen-
Los Angeles21
Madera4
Marin3
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa8
Nevada-
Orange156
Placer19
Plumas-
Riverside-
Sacramento223
San Benito-
San Bernardino8
San Diego4
San Francisco-
San Joaquin36
San Luis Obispo-
San Mateo8
Santa Barbara-
Santa Clara682
Santa Cruz1
Shasta2
Sierra-
Siskiyou-
Solano31
Sonoma12
Stanislaus27
Sutter19
Tehama-
Trinity-
Tulare38
Tuolumne-
Ventura2
Yolo40
Yuba10
Total1480

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

Weekly Reports

2014 YTD WNV Activity Map
2014 US Arboviral Activity Update
Arbovirus Bulletin #26
Arbovirus Bulletin #25
Arbovirus Bulletin #24
Arbovirus Bulletin #23
Arbovirus Bulletin #22
Arbovirus Bulletin #21
Arbovirus Bulletin #20
Arbovirus Bulletin #19
- view full list of Weekly Reports -

Humans

2014 Human WNV Incidence Report
2003-2014 WNV Case Summary
2013 Human WNV Incidence Report
2012 Human WNV Surveillance Report
2012 Human WNV Incidence Report
2003-2011 WNV Case Summary by County
2011 Human WNV Case Linelist
2011 Human WNV Incidence Report
2010 Human WNV Incidence Report
2010 Human WNV Case Linelist
- view full list of Humans -

Dead Birds

Reported, Tested, Positive 2014
Positive Species for 2014
Positive Counts by City/County for 2014
Positive Counts by City/County for 2013
Reported, Tested, Positive 2013
Positive Species for 2013
Positive Counts by City/County for 2014
Reported, Tested, Positive 2014 YTD
Positive Species for 2014
Positive Counts by City/County for 2012
- view full list of Dead Birds -

Mosquitoes

AMOR - NJLT 5 Year Average Week 32
AMOR - GRAVID Week 32
AMOR - EVS Week 32
AMOR - NJLT Week 32
AMOR - NJLT 5 Year Average Week 31
AMOR - GRAVID Week 31
AMOR - NJLT Week 31
AMOR - EVS Week 31
AMOR - NJLT 5 Year Average Week 30
AMOR - GRAVID Week 30
- view full list of Mosquitoes -

Horses

2010 Confirmed Equine Cases Report
2010 Equine WNV Result Map
2009 Equine WNV Result Map
2009 Confirmed Equine Cases
2008 Confirmed Equine Cases
2007 Equine WNV Result Map

Reports and Analyses

2011 West Nile virus Activity in California
1999-2010 Total WNND cases by year
1999-2011 Reported WNV Disease Cases in Humans
2010 West Nile virus Activity in California
2009 WNV Activity by County
2008 WNV Activity Map
2008 WNV Activity by County
2004-2008 Comparative Line Graphs of West Nile Virus Activity
2007 YTD WNV Activity Map
2007 WNV Activity by County
- view full list of Reports and Analyses -

Locate Your Local Mosquito and Vector Control Agency
Search by Zip Code

Compared to previous year and previous five-year average to date

As of Aug 20, 2014201420135Y AVG
Counties363932
Human cases935933
Dead birds1480834508
Mosquito samples20411349994
Sentinel chickens129176107
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2013 YTD activity -

WNV Reports

Weekly Report

08.20 2014 YTD WNV Activity Map
08.19 2014 US Arboviral Activity Update
08.15 Arbovirus Bulletin #26

Humans

08.18 2014 Human WNV Incidence Report
08.18 2003-2014 WNV Case Summary
08.12 2013 Human WNV Incidence Report

Dead Birds

08.20Reported, Tested, Positive 2014
08.20Positive Counts by City/County for 2014
08.20Positive Species for 2014

Mosquitoes

08.15 AMOR - EVS Week 32
08.15 AMOR - GRAVID Week 32
08.15 AMOR - NJLT Week 32

Horses

12.16 2010 Equine WNV Result Map
12.16 2010 Confirmed Equine Cases Report
05.26 2009 Equine WNV Result Map
- view report archives -