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-
Fresno-
Glenn-
Humboldt-
Imperial-
Inyo-
Kern-
Kings-
Lake-
Lassen-
Los Angeles-
Madera-
Marin-
Mariposa-
Mendocino-
Merced-
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange2
Placer-
Plumas-
Riverside-
Sacramento-
San Benito-
San Bernardino-
San Diego1
San Francisco-
San Joaquin2
San Luis Obispo-
San Mateo-
Santa Barbara-
Santa Clara-
Santa Cruz-
Shasta-
Sierra-
Siskiyou-
Solano-
Sonoma-
Stanislaus-
Sutter-
Tehama-
Trinity-
Tulare-
Tuolumne-
Ventura-
Yolo-
Yuba-
Total5

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

News

West Nile virus and Dead Bird Hotline

Oct 12, 2018

The West Nile virus and Dead Bird Hotline is staffed with live operators from mid-April to mid-October each year. During the winter months, you can still report a dead bird by using the report form on this website:

Report a Dead Bird

Although West Nile virus testing is reduced in the winter, some local vector control districts are collecting and testing birds year-round, especially crows, ravens, and magpies.

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 Jun 21, 2019201920185Y AVG
Counties81521
Human cases092
Dead birds527126
Mosquito samples22031180
Sentinel chickens002
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2019 YTD activity -

WNV Reports

Weekly Report

06.21 Arbovirus Bulletin #12
06.21 2019 YTD SLEV Activity Map
06.21 2019 YTD WNV Activity Map

Humans

05.15 2018 Human WNV Incidence Report
05.15 2003-2018 WNV Case Summary
03.29 2017 Human WNV Incidence Report

Dead Birds

06.21Positive Counts by City/County for 2019
06.21Positive Species for 2019
06.21Reported, Tested, Positive 2019

Mosquitoes

06.21 AMOR - EVS Week 24
06.21 AMOR - GRAVID Week 24
06.21 AMOR - NJLT Week 24
- view report archives -