Case Counts by County
| County | Human cases | | Alameda | 1 | | Alpine | - | | Amador | - | | Butte | 5 | | Calaveras | 1 | | Colusa | 1 | | Contra Costa | 4 | | Del Norte | - | | El Dorado | 1 | | Fresno | 3 | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | 1 | | Kings | 1 | | Lake | - | | Lassen | - | | Los Angeles | 144 | | Madera | - | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | 1 | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 65 | | Placer | 6 | | Plumas | - | | Riverside | 60 | | Sacramento | 13 | | San Benito | - | | San Bernardino | 24 | | San Diego | 22 | | San Francisco | - | | San Joaquin | 12 | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | 1 | | Santa Cruz | - | | Shasta | 1 | | Sierra | - | | Siskiyou | - | | Solano | 1 | | Sonoma | - | | Stanislaus | 17 | | Sutter | - | | Tehama | 4 | | Trinity | - | | Tulare | 4 | | Tuolumne | - | | Ventura | - | | Yolo | 1 | | Yuba | - |
| Total | 394 |
| County | Horses | | Alameda | - | | Alpine | - | | Amador | - | | Butte | - | | Calaveras | - | | Colusa | - | | Contra Costa | 3 | | Del Norte | - | | El Dorado | - | | Fresno | 1 | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | - | | Kings | - | | Lake | 1 | | Lassen | - | | Los Angeles | - | | Madera | - | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | 1 | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 2 | | Placer | 1 | | Plumas | - | | Riverside | 9 | | Sacramento | 3 | | San Benito | - | | San Bernardino | 2 | | San Diego | 4 | | San Francisco | - | | San Joaquin | - | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | - | | Santa Cruz | - | | Shasta | - | | Sierra | - | | Siskiyou | - | | Solano | - | | Sonoma | - | | Stanislaus | 2 | | Sutter | - | | Tehama | - | | Trinity | - | | Tulare | 1 | | Tuolumne | - | | Ventura | 1 | | Yolo | 1 | | Yuba | - |
| Total | 32 |
| County | Dead birds | | Alameda | 12 | | Alpine | - | | Amador | 3 | | Butte | 38 | | Calaveras | 1 | | Colusa | 3 | | Contra Costa | 88 | | Del Norte | 1 | | El Dorado | 9 | | Fresno | 41 | | Glenn | 17 | | Humboldt | 1 | | Imperial | - | | Inyo | - | | Kern | 10 | | Kings | 1 | | Lake | 2 | | Lassen | - | | Los Angeles | 477 | | Madera | 3 | | Marin | 1 | | Mariposa | - | | Mendocino | 1 | | Merced | 5 | | Modoc | 1 | | Mono | 2 | | Monterey | 6 | | Napa | 1 | | Nevada | 5 | | Orange | 628 | | Placer | 4 | | Plumas | - | | Riverside | 39 | | Sacramento | 130 | | San Benito | - | | San Bernardino | 173 | | San Diego | 553 | | San Francisco | - | | San Joaquin | 69 | | San Luis Obispo | 2 | | San Mateo | 2 | | Santa Barbara | 1 | | Santa Clara | 13 | | Santa Cruz | 3 | | Shasta | 7 | | Sierra | - | | Siskiyou | - | | Solano | 7 | | Sonoma | 11 | | Stanislaus | 45 | | Sutter | 2 | | Tehama | 6 | | Trinity | 1 | | Tulare | 51 | | Tuolumne | - | | Ventura | 24 | | Yolo | 9 | | Yuba | - |
| Total | 2509 |
| County | Mosquito samples | | Alameda | 1 | | Alpine | - | | Amador | - | | Butte | 5 | | Calaveras | - | | Colusa | - | | Contra Costa | 31 | | Del Norte | - | | El Dorado | - | | Fresno | 52 | | Glenn | 1 | | Humboldt | - | | Imperial | 7 | | Inyo | - | | Kern | 7 | | Kings | - | | Lake | 3 | | Lassen | 1 | | Los Angeles | 504 | | Madera | 1 | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | - | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 330 | | Placer | 27 | | Plumas | - | | Riverside | 118 | | Sacramento | 277 | | San Benito | - | | San Bernardino | 169 | | San Diego | 40 | | San Francisco | - | | San Joaquin | 207 | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | 1 | | Santa Cruz | - | | Shasta | - | | Sierra | - | | Siskiyou | - | | Solano | 1 | | Sonoma | 2 | | Stanislaus | 75 | | Sutter | 12 | | Tehama | - | | Trinity | - | | Tulare | 64 | | Tuolumne | - | | Ventura | - | | Yolo | 19 | | Yuba | 1 |
| Total | 1956 |
| County | Sentinel chickens | | Alameda | - | | Alpine | - | | Amador | - | | Butte | 31 | | Calaveras | 9 | | Colusa | 1 | | Contra Costa | 15 | | Del Norte | - | | El Dorado | - | | Fresno | 24 | | Glenn | 5 | | Humboldt | - | | Imperial | 26 | | Inyo | - | | Kern | 17 | | Kings | 1 | | Lake | - | | Lassen | - | | Los Angeles | 128 | | Madera | 2 | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | 3 | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 3 | | Placer | 11 | | Plumas | - | | Riverside | 117 | | Sacramento | 7 | | San Benito | - | | San Bernardino | 61 | | San Diego | 15 | | San Francisco | - | | San Joaquin | 18 | | San Luis Obispo | - | | San Mateo | - | | Santa Barbara | - | | Santa Clara | - | | Santa Cruz | - | | Shasta | 3 | | Sierra | - | | Siskiyou | - | | Solano | 7 | | Sonoma | - | | Stanislaus | 38 | | Sutter | 9 | | Tehama | - | | Trinity | - | | Tulare | 20 | | Tuolumne | - | | Ventura | 4 | | Yolo | - | | Yuba | 1 |
| Total | 576 |
| County | Squirrels | | Alameda | 1 | | Alpine | - | | Amador | - | | Butte | - | | Calaveras | - | | Colusa | - | | Contra Costa | 6 | | Del Norte | - | | El Dorado | - | | Fresno | 1 | | Glenn | - | | Humboldt | - | | Imperial | - | | Inyo | - | | Kern | - | | Kings | - | | Lake | - | | Lassen | - | | Los Angeles | 14 | | Madera | - | | Marin | - | | Mariposa | - | | Mendocino | - | | Merced | - | | Modoc | - | | Mono | - | | Monterey | - | | Napa | - | | Nevada | - | | Orange | 4 | | Placer | - | | Plumas | - | | Riverside | - | | Sacramento | 1 | | 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 | - | | Sonoma | - | | Stanislaus | - | | Sutter | - | | Tehama | - | | Trinity | - | | Tulare | - | | Tuolumne | - | | Ventura | - | | Yolo | - | | Yuba | - |
| Total | 32 |
WNV Activity by County Printable Version
2008 |
2007
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Weekly ReportsHumansDead BirdsMosquitoesSentinel ChickensHorsesReports and Analyses
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Locate Your Local Mosquito and Vector Control Agency
Compared to 2007 YTD
| As of 11/19/08 | 2007 | 2008 |
| Counties | 51 | 49 |
| Human cases | 375 | 394 | | Horses | 28 | 32 | | Dead birds | 1381 | 2509 | | Mosquito samples | 1004 | 1956 | | Sentinel chickens | 510 | 576 | | Squirrels | 26 | 32 |
2007 YTD - Year to date corresponds to the same time last year.
- view all 2007 YTD activity -
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WNV Reports
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