Case Counts by County

CountyDead birds
Alameda13
Alpine-
Amador-
Butte1
Calaveras-
Colusa1
Contra Costa18
Del Norte-
El Dorado1
Fresno6
Glenn1
Humboldt-
Imperial-
Inyo-
Kern2
Kings-
Lake5
Lassen-
Los Angeles7
Madera3
Marin2
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa1
Nevada-
Orange43
Placer10
Plumas-
Riverside-
Sacramento112
San Benito-
San Bernardino2
San Diego1
San Francisco-
San Joaquin19
San Luis Obispo-
San Mateo3
Santa Barbara-
Santa Clara429
Santa Cruz1
Shasta2
Sierra-
Siskiyou-
Solano26
Sonoma6
Stanislaus14
Sutter11
Tehama-
Trinity-
Tulare31
Tuolumne-
Ventura1
Yolo16
Yuba3
Total791

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

Weekly Reports

2014 YTD WNV Activity Map
Arbovirus Bulletin #22
2014 US Arboviral Activity Update
Arbovirus Bulletin #21
Arbovirus Bulletin #20
Arbovirus Bulletin #19
Arbovirus Bulletin #18
Arbovirus Bulletin #17
Arbovirus Bulletin #16
Arbovirus Bulletin #15
- 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 Incidence Report
2011 Human WNV Case Linelist
2010 Human WNV Case Linelist
2010 Human WNV Incidence Report
- 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 - EVS Week 28
AMOR - NjLT Week 28
AMOR - NjLT 5 Year Average Week 28
AMOR - GRAVID Week 28
AMOR - GRAVID Week 27
AMOR - NjLT 5 Year Average Week 27
AMOR - NjLT Week 27
AMOR - EVS Week 27
AMOR - NJLT 5 Year Average Week 26
AMOR - NJLT Week 26
- 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 2013 YTD

As of Jul 23, 201420132014
Counties3234
Human cases415
Dead birds325791
Mosquito samples555771
Sentinel chickens2714
2013 YTD - Year to date corresponds to the same time last year.

- view all 2013 YTD activity -

WNV Reports

Weekly Report

07.23 2014 YTD WNV Activity Map
07.18 Arbovirus Bulletin #22
07.15 2014 US Arboviral Activity Update

Humans

07.21 2014 Human WNV Incidence Report
07.21 2003-2014 WNV Case Summary
04.21 2013 Human WNV Incidence Report

Dead Birds

07.23Reported, Tested, Positive 2014
07.23Positive Counts by City/County for 2014
07.23Positive Species for 2014

Mosquitoes

07.18 AMOR - EVS Week 28
07.18 AMOR - GRAVID Week 28
07.18 AMOR - NjLT Week 28

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 -