CA Dept. of Public Health UC Davis Arbovirus Research and Training Mosquito and Vector Control Assoc. of CA

Case Counts by County

CountyDead birds
Alameda-
Alpine-
Amador-
Butte-
Calaveras-
Colusa-
Contra Costa-
Del Norte-
El Dorado-
Fresno4
Glenn-
Humboldt-
Imperial-
Inyo-
Kern-
Kings-
Lake-
Lassen-
Los Angeles3
Madera-
Marin-
Mariposa-
Mendocino-
Merced1
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange8
Placer-
Plumas-
Riverside-
Sacramento1
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin3
San Luis Obispo-
San Mateo-
Santa Barbara-
Santa Clara-
Santa Cruz-
Shasta-
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus-
Sutter-
Tehama-
Trinity-
Tulare7
Tuolumne-
Ventura-
Yolo-
Yuba-
Total28

WNV Activity by County
Printable Version
2018 | 2017 | 2016 | 2015 | 2014
2013 | 2012 | 2011
2010 | 2009 | 2008
2007

Reports and Analyses

2019-07-102018 US Arboviral Activity Update
2019-05-162018 YTD WNV Activity Map
2018-09-212017 US Arboviral Activity Update
2018-04-042017 YTD WNV Activity Map
2018-01-122017 YTD SLEV Activity Map
2017-03-082016 YTD WNV Activity Map
2017-01-172016 US Arboviral Activity Update
2015-04-022014 YTD WNV Activity Map
2013-02-252012 YTD WNV Activity Map
2012-12-112012 US Arboviral Activity Update
2012-08-222011 West Nile virus Activity in California
2012-07-111999-2010 Total WNND cases by year
2012-04-172011 US Arboviral Activity Update
2012-02-282011 YTD WNV Activity Map
2011-07-111999-2011 Reported WNV Disease Cases in Humans
2010-08-222010 West Nile virus Activity in California
2009-08-222009 WNV Activity by County
2009-01-212008 WNV Activity Map
2009-01-212008 WNV Activity by County
2008-12-162004-2008 Comparative Line Graphs of West Nile Virus Activity
2008-03-072007 YTD WNV Activity Map
2008-01-282007 WNV Activity by County
2007-10-302003-2007 WNV Activity Summary
2007-03-262006 West Nile Virus Summary Presentation
2006-12-232006 West Nile Activity in California
2006-08-222006 Summary of WNV-Positive Surveillance Elements in CA 2006
2005-12-312005 West Nile Activity in California
2005-12-312005 West Nile Virus Summary Presentation
2004-12-312004 West Nile Virus Summary Presentation
2004-12-312004 West Nile Activity in California
2004-12-122004 WNV Agency Survey Report
2003-12-312003 West Nile Activity in California

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

As of Jul 19, 2019201920185Y AVG
Counties172430
Human cases2106
Dead birds28108363
Mosquito samples802315779
Sentinel chickens0723
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2019 YTD activity -

WNV Reports

Weekly Report

07.19 Arbobulletin #16
07.19 2019 YTD SLEV Activity Map
07.19 2019 YTD WNV Activity Map

Humans

07.19 2019 Human WNV Incidence Report
07.19 2003-2019 WNV Case Summary
05.15 2018 Human WNV Incidence Report

Dead Birds

07.19Positive Counts by City/County for 2019
07.19Positive Species for 2019
07.19Reported, Tested, Positive 2019

Mosquitoes

07.19 AMOR - EVS Week 28
07.19 AMOR - GRAVID Week 28
07.19 AMOR - NJLT Week 28
- view report archives -