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West Nile Virus
Human
2013
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West Nile Virus:  California - Human
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Siskiyou County (1) Del Norte County Modoc County Humboldt County Trinity County Lassen County Shasta County (1) Humboldt County Tehama County (3) Plumas County Butte County (23) Mendocino County Glenn County (9) Sierra County Yuba County (9) Lake County Nevada County Colusa County (2) Placer County (4) Sutter County (10) El Dorado County (1) Alpine County Yolo County (6) Napa County (1) Sonoma County Sacramento County (10) Mono County Amador County Solano County (1) Calaveras County Tuolumne County Marin County (2) San Joaquin County (9) Solano County (1) Solano County (1) Contra Costa County (4) Solano County (1) Stanislaus County (16) Sacramento County (10) Contra Costa County (4) Alameda County Mariposa County Marin County (2) San Francisco County (1) San Francisco County (1) Alameda County San Francisco County (1) Madera County (3) San Francisco County (1) San Francisco County (1) San Francisco County (1) San Mateo County San Francisco County (1) San Francisco County (1) Merced County Fresno County (6) Santa Clara County (2) Inyo County Santa Cruz County San Benito County Monterey County Tulare County (5) Kings County (1) San Bernardino County (13) San Luis Obispo County Kern County (26) Santa Barbara County (1) Ventura County (2) Los Angeles County (150) Riverside County (36) Santa Barbara County (1) Santa Barbara County (1) Santa Barbara County (1) Santa Barbara County (1) Ventura County (2) Ventura County (2) Ventura County (2) Orange County (10) Los Angeles County (150) San Diego County Santa Barbara County (1) Los Angeles County (150) Imperial County Ventura County (2) Los Angeles County (150) Los Angeles County (150) San Diego County Navigate to Arizona page Navigate to Idaho page Navigate to Nevada page Navigate to Oregon page Navigate to Utah page Navigate to Wyoming page
Map Scalebar 350 km
Cumulative 2013 Data as of 3 am, Jan 07, 2014*
These data are provisional and may be revised or adjusted in the future.
[Epi curve - Vertical bar graph showing number of incidents for each of 52 weeks]
Cumulative Human Disease Cases by Local Jurisdiction - California, 2013
Butte County23
Colusa County2
Contra Costa County4
El Dorado County1
Fresno County6
Glenn County9
Kern County26
Kings County1
Los Angeles County150
Madera County3
Marin County2
Napa County1
Orange County10
Placer County4
Riverside County36
Sacramento County10
San Bernardino County13
San Francisco County1
San Joaquin County9
Santa Barbara County1
Santa Clara County2
Shasta County1
Siskiyou County1
Solano County1
Stanislaus County16
Sutter County10
Tehama County3
Tulare County5
Ventura County2
Yolo County6
Yuba County9
Cumulative Total Entire State: 368
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Map Legend
* Data demonstrates local jurisdiction of residence and not necessarily the locale where the infection was acquired.
** States and counties in yellow are those in which virus activity has been reported historically, but no positive test results have been reported or no surveillance has occurred this year.