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-
Orange18
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-
Total501

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

Special Reports

2004 West Nile Virus Prevention, Surveillance, and Control Workshop

Slide Presentations
Dec 9, 2004

Please cite presentation authors and the "West Nile Virus Prevention, Surveillance, and Control Workshop" when using these materials.

Please note: Data and analyses discussed in these presentations were current when presented. Data collection and analyses are ongoing in many cases, therefore updates may be forthcoming elsewhere on this web site through publications such as CDHS Arbovirus Bulletins, Adult Mosquito Occurrence Reports, or other venues. The workshop presentations will not be updated.

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

As of Jan 10, 2019201820175Y AVG
Counties414442
Human cases215553559
Dead birds5015101231
Mosquito samples196333713106
Sentinel chickens163305341
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2018 YTD activity -

WNV Reports

Weekly Report

01.31 2018 YTD WNV Activity Map
12.14 Arbovirus Bulletin #35
12.14 2018 YTD SLEV Activity Map

Humans

01.31 2018 Human WNV Incidence Report
01.31 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

01.31Reported, Tested, Positive 2018
01.31Positive Species for 2018
01.31Positive 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 -