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

Weekly Reports

2019-07-19 2019 YTD WNV Activity Map
2019-07-192019 YTD SLEV Activity Map
2019-07-19Arbobulletin #16
2019-07-12Arbobulletin #15
2019-07-08Arbobulletin #14
2019-07-01Arbobulletin #13
2019-06-21Arbovirus Bulletin #12
2019-06-14Arbovirus Bulletin #11
2019-06-112019 US Arboviral Activity Update
2019-06-07Arbovirus Bulletin #10
- view full list of Weekly Reports -

Humans

2019-07-192019 Human WNV Incidence Report
2019-07-192003-2019 WNV Case Summary
2019-05-152018 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
- view full list of Humans -

Dead Birds

2019-07-19Positive Species for 2019
2019-07-19Positive Counts by City/County for 2019
2019-07-19Reported, Tested, Positive 2019
2019-04-08Positive Species for 2018
2019-04-08Positive Counts by City/County for 2018
2019-04-08Reported, Tested, Positive 2018
2018-02-16Positive Species for 2017
2018-02-16Positive Counts by City/County for 2017
2018-02-16Reported, Tested, Positive 2017
2017-03-30Positive Species for 2016
- view full list of Dead Birds -

Mosquitoes

2019-07-19AMOR - NJLT Week 28
2019-07-19AMOR - EVS Week 28
2019-07-19AMOR - NJLT 5 Year Average Week 28
2019-07-19AMOR - GRAVID Week 28
2019-07-12AMOR - NJLT 5 Year Average Week 27
2019-07-12AMOR - EVS Week 27
2019-07-12AMOR - GRAVID Week 27
2019-07-12AMOR - NJLT Week 27
2019-07-05AMOR - NJLT Week 26
2019-07-05AMOR - EVS Week 26
- 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

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
- 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 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 -