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

Case Counts by County

CountyDead birds
Alameda5
Alpine-
Amador-
Butte3
Calaveras-
Colusa-
Contra Costa5
Del Norte-
El Dorado-
Fresno3
Glenn-
Humboldt-
Imperial-
Inyo-
Kern-
Kings3
Lake3
Lassen-
Los Angeles50
Madera2
Marin2
Mariposa-
Mendocino-
Merced3
Modoc-
Mono-
Monterey-
Napa-
Nevada-
Orange19
Placer11
Plumas-
Riverside4
Sacramento293
San Benito-
San Bernardino-
San Diego175
San Francisco-
San Joaquin20
San Luis Obispo-
San Mateo9
Santa Barbara-
Santa Clara48
Santa Cruz1
Shasta-
Sierra-
Siskiyou-
Solano1
Sonoma-
Stanislaus6
Sutter6
Tehama-
Trinity-
Tulare1
Tuolumne-
Ventura11
Yolo30
Yuba1
Total715

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

Resources

West Nile Virus Information for Physicians

Aug 3, 2012

West Nile virus (WNV) has been detected in many regions of the state. Physicians should:


  • Be aware if WNV is active in their area
  • Look for symptoms of WNV
  • Test for WNV because testing:

    • differentiates WNV from other conditions (enterovirus, other arboviral diseases) and thus may prompt a change in treatment regime
    • results offer anticipatory guidance--both WNV neuroinvasive disease and WN fever patients can have lingering symptoms and knowing the underlying etiology is helpful for the patient and family members
    • helps mosquito control and public health agencies institute proper control measures to reduce the risk of further cases in the event of a positive result

  • Contact their local public health department for details on sample submission and testing


For additional information, please see these resources:

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 29, 2016201620155Y AVG
Counties343630
Human cases3108
Dead birds715303417
Mosquito samples14871058766
Sentinel chickens734542
YTD - Year to date corresponds to the same time last year or last five years.

- view all 2015 YTD activity -

WNV Reports

Weekly Report

07.29 Arbovirus Bulletin #21
07.29 2016 YTD WNV Activity Map
07.22 Arbovirus Bulletin #20

Humans

03.21 2015 Human WNV Incidence Report
03.21 2003-2015 WNV Case Summary
03.09 2014 Human WNV Incidence Report

Dead Birds

07.29Positive Species for 2016
07.29Reported, Tested, Positive 2016
07.29Positive Counts by City/County for 2016

Mosquitoes

07.29 AMOR - EVS Week 29
07.29 AMOR - GRAVID Week 29
07.29 AMOR - NJLT Week 29
- view report archives -