Case Counts by County
| County | Human cases | | Alameda | - | | Alpine | - | | Amador | - | | Butte | - | | Calaveras | - | | Colusa | - | | Contra Costa | 1 | | Del Norte | - | | El Dorado | - | | Fresno | 4 | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | - | | Kings | - | | Lake | - | | Lassen | - | | Los Angeles | - | | Madera | - | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | - | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 2 | | Placer | - | | Plumas | - | | Riverside | - | | Sacramento | - | | San Benito | - | | San Bernardino | - | | San Diego | - | | San Francisco | - | | San Joaquin | - | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | - | | Santa Cruz | - | | Shasta | - | | Sierra | - | | Siskiyou | - | | Solano | 1 | | Sonoma | - | | Stanislaus | 4 | | Sutter | - | | Tehama | - | | Trinity | - | | Tulare | 3 | | Tuolumne | - | | Ventura | - | | Yolo | - | | Yuba | - |
| Total | 15 |
| County | Dead birds | | Alameda | 13 | | Alpine | - | | Amador | - | | Butte | 1 | | Calaveras | - | | Colusa | 1 | | Contra Costa | 18 | | Del Norte | - | | El Dorado | 1 | | Fresno | 6 | | Glenn | 1 | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | 2 | | Kings | - | | Lake | 5 | | Lassen | - | | Los Angeles | 7 | | Madera | 3 | | Marin | 2 | | Mariposa | - | | Mendocino | - | | Merced | - | | Modoc | - | | Mono | - | | Monterey | - | | Napa | 1 | | Nevada | - | | Orange | 43 | | Placer | 10 | | Plumas | - | | Riverside | - | | Sacramento | 112 | | San Benito | - | | San Bernardino | 2 | | San Diego | 1 | | San Francisco | - | | San Joaquin | 19 | | San Luis Obispo | - | | San Mateo | 3 | | Santa Barbara | - | | Santa Clara | 429 | | Santa Cruz | 1 | | Shasta | 2 | | Sierra | - | | Siskiyou | - | | Solano | 26 | | Sonoma | 6 | | Stanislaus | 14 | | Sutter | 11 | | Tehama | - | | Trinity | - | | Tulare | 31 | | Tuolumne | - | | Ventura | 1 | | Yolo | 16 | | Yuba | 3 |
| Total | 791 |
| County | Mosquito samples | | Alameda | 1 | | Alpine | - | | Amador | - | | Butte | 8 | | Calaveras | - | | Colusa | - | | Contra Costa | 6 | | Del Norte | - | | El Dorado | - | | Fresno | 36 | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | 21 | | Kings | 24 | | Lake | 13 | | Lassen | - | | Los Angeles | 19 | | Madera | 9 | | Marin | 3 | | Mariposa | - | | Mendocino | - | | Merced | 3 | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 69 | | Placer | 23 | | Plumas | - | | Riverside | 3 | | Sacramento | 154 | | San Benito | - | | San Bernardino | 20 | | San Diego | - | | San Francisco | - | | San Joaquin | 79 | | San Luis Obispo | - | | San Mateo | 1 | | Santa Barbara | - | | Santa Clara | 17 | | Santa Cruz | - | | Shasta | 6 | | Sierra | - | | Siskiyou | - | | Solano | 6 | | Sonoma | 2 | | Stanislaus | 30 | | Sutter | 17 | | Tehama | - | | Trinity | - | | Tulare | 134 | | Tuolumne | - | | Ventura | - | | Yolo | 56 | | Yuba | 11 |
| Total | 771 |
| County | Sentinel chickens | | Alameda | - | | Alpine | - | | Amador | - | | Butte | - | | Calaveras | - | | Colusa | - | | Contra Costa | 4 | | Del Norte | - | | El Dorado | - | | Fresno | - | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | - | | Kings | - | | Lake | - | | Lassen | - | | Los Angeles | 1 | | Madera | - | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | 1 | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | - | | Placer | - | | Plumas | - | | Riverside | - | | Sacramento | - | | San Benito | - | | San Bernardino | 5 | | San Diego | - | | San Francisco | - | | San Joaquin | - | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | - | | Santa Cruz | - | | Shasta | - | | Sierra | - | | Siskiyou | - | | Solano | 3 | | Sonoma | - | | Stanislaus | - | | Sutter | - | | Tehama | - | | Trinity | - | | Tulare | - | | Tuolumne | - | | Ventura | - | | Yolo | - | | Yuba | - |
| Total | 14 |
WNV Activity by County
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Locate Your Local Mosquito and Vector Control Agency
Compared to 2013 YTD
| As of Jul 23, 2014 | 2013 | 2014 |
| Counties | 32 | 34 |
| Human cases | 4 | 15 | | Dead birds | 325 | 791 | | Mosquito samples | 555 | 771 | | Sentinel chickens | 27 | 14 |
2013 YTD - Year to date corresponds to the same time last year.
- view all 2013 YTD activity -
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WNV Reports
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