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

Case Counts by County

CountyDead birds
Alameda20
Alpine-
Amador-
Butte4
Calaveras-
Colusa-
Contra Costa13
Del Norte-
El Dorado2
Fresno-
Glenn-
Humboldt1
Imperial-
Inyo-
Kern1
Kings-
Lake-
Lassen-
Los Angeles19
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange15
Placer44
Plumas-
Riverside6
Sacramento241
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin16
San Luis Obispo-
San Mateo5
Santa Barbara-
Santa Clara55
Santa Cruz2
Shasta5
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus1
Sutter4
Tehama-
Trinity-
Tulare-
Tuolumne1
Ventura-
Yolo41
Yuba-
Total497

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

Reports and Analyses

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 Virus Summary Presentation
2005-12-312005 West Nile Activity in California
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 Nov 09, 2018201820175Y AVG
Counties414442
Human cases174453498
Dead birds4974921354
Mosquito samples196033543201
Sentinel chickens158304399
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2018 YTD activity -

WNV Reports

Weekly Report

11.09 Arbovirus Bulletin #32
11.09 2018 YTD WNV Activity Map
11.02 Arbovirus Bulletin #31

Humans

11.08 2018 Human WNV Incidence Report
11.08 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

11.09Reported, Tested, Positive 2018
11.09Positive Species for 2018
11.09Positive Counts by City/County for 2018

Mosquitoes

11.09 AMOR - EVS Week 44
11.09 AMOR - GRAVID Week 44
11.09 AMOR - NJLT Week 44
- view report archives -