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-
Orange16
Placer44
Plumas-
Riverside6
Sacramento241
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin16
San Luis Obispo-
San Mateo5
Santa Barbara-
Santa Clara56
Santa Cruz2
Shasta5
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus1
Sutter4
Tehama-
Trinity-
Tulare-
Tuolumne1
Ventura-
Yolo41
Yuba-
Total499

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

Weekly Reports

2018-12-142018 YTD SLEV Activity Map
2018-12-14Arbovirus Bulletin #35
2018-12-142018 YTD WNV Activity Map
2018-12-112018 US Arboviral Activity Update
2018-11-30Arbovirus Bulletin #34
2018-11-16Arbovirus Bulletin #33
2018-11-09Arbovirus Bulletin #32
2018-11-02Arbovirus Bulletin #31
2018-10-26Arbovirus Bulletin #30
2018-10-19Arbovirus Bulletin #29
- view full list of Weekly Reports -

Humans

2018-12-132003-2018 WNV Case Summary
2018-12-132018 Human WNV Incidence Report
2018-03-292017 Human WNV Incidence Report
2017-02-082016 Human WNV Incidence Report
2016-03-212015 Human WNV Incidence Report
2015-03-092014 Human WNV Incidence Report
2014-08-122013 Human WNV Incidence Report
2013-07-222012 Human WNV Surveillance Report
2013-03-182012 Human WNV Incidence Report
2012-06-132003-2011 WNV Case Summary by County
- view full list of Humans -

Dead Birds

2018-12-14Positive Species for 2018
2018-12-14Positive Counts by City/County for 2018
2018-12-14Reported, Tested, Positive 2018
2018-02-16Positive Species for 2017
2018-02-16Reported, Tested, Positive 2017
2018-02-16Positive Counts by City/County for 2017
2017-03-30Positive Counts by City/County for 2016
2017-03-30Reported, Tested, Positive 2016
2017-03-30Positive Species for 2016
2016-02-29Positive Counts by City/County for 2015
- view full list of Dead Birds -

Mosquitoes

2018-11-09AMOR - EVS Week 44
2018-11-09AMOR - NJLT 5 Year Average Week 44
2018-11-09AMOR - NJLT Week 44
2018-11-09AMOR - GRAVID Week 44
2018-11-02AMOR - NJLT Week 43
2018-11-02AMOR - GRAVID Week 43
2018-11-02AMOR - NJLT 5 Year Average Week 43
2018-11-02AMOR - EVS Week 43
2018-10-26AMOR - GRAVID Week 42
2018-10-26AMOR - EVS Week 42
- view full list of Mosquitoes -

Horses

2018-08-102016 Confirmed Equine Cases Report
2018-08-102015 Confirmed Equine Cases Report
2018-08-102014 Confirmed Equine Cases Report
2018-08-102013 Confirmed Equine Cases Report
2018-08-102012 Confirmed Equine Cases Report
2018-08-102011 Confirmed Equine Cases Report
2018-08-102017 Confirmed Equine Cases Report
2010-12-162010 Confirmed Equine Cases Report
2010-12-162010 Equine WNV Result Map
2010-05-262009 Equine WNV Result Map
- view full list of Horses -

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
- view full list of Reports and Analyses -

Having problems with mosquitoes?

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 Dec 14, 2018201820175Y AVG
Counties414442
Human cases203501559
Dead birds4995061378
Mosquito samples196333713217
Sentinel chickens163305405
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2018 YTD activity -

WNV Reports

Weekly Report

12.14 Arbovirus Bulletin #35
12.14 2018 YTD SLEV Activity Map
12.14 2018 YTD WNV Activity Map

Humans

12.13 2018 Human WNV Incidence Report
12.13 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

12.14Reported, Tested, Positive 2018
12.14Positive Species for 2018
12.14Positive 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 -