2016 West Nile Virus Activity
This map details mosquitoes, dead birds, chickens, and horses that have tested positive for West Nile virus. You can zoom in and out of the map and click on the placemarkers to get a detailed description of the date the positive activity was confirmed and the approximate location.
For information regarding human cases, please click here.
Mosquito Samples: 11
| n | Date Collected | City | Cross Streets | Species |
|---|---|---|---|---|
| 1 | 7/11/16 | Knightsen | Holland Tract Area | Cx tarsalis |
| 2 | 7/18/16 | Antioch | Cavallo Ave x Wilbur Ave | Cx tarsalis |
| 3 | 8/1/16 | Knightsen | Holland Tract Area | Cx tarsalis |
| 4 | 8/1/16 | Byron | Byron Hwy x Rankin Rd | Cx tarsalis |
| 5 | 8/29/16 | Bethel Island | Stone Rd | Cx tarsalis |
| 6 | 8/29/16 | Discovery Bay | Byron Tract NW | Cx tarsalis |
| 7 | 9/6/16 | Byron | Byron Hwy x Rankin Rd | Cx tarsalis |
| 8 | 9/6/16 | Brentwood | Sycamore Ave x Garin Pkwy | Cx tarsalis |
| 9 | 9/19/16 | Knightsen | Holland Tract Area | Cx tarsalis |
| 10 | 10/3/16 | Byron | Byron Hwy x Rankin Rd | Cx tarsalis |
| 11 | 10/24/16 | Bethel Island | Stone Rd | Cx tarsalis |
Dead Birds: 33
| n | Date Reported | City | Cross Streets | Species |
|---|---|---|---|---|
| 1 | 6/13/16 | Antioch | Prewett Ranch Dr x Mokelumne Dr | American Crow |
| 2 | 7/11/16 | Brentwood | Eden Plains Rd x Chestnut St | Western Scrub Jay |
| 3 | 7/12/16 | Antioch | Marigold Wy x Prewett Ranch Dr | American Crow |
| 4 | 7/13/16 | Brentwood | Oak St x 2nd St | American Crow |
| 5 | 7/25/16 | Oakley | Oakley Rd x Trenton St | American Crow |
| 6 | 7/31/16 | Blackhawk | Deer Meadow Dr x Live Oak Dr | American Crow |
| 7 | 8/1/16 | Oakley | Big Bear Rd x Bernard Rd | Western Scrub Jay |
| 8 | 8/4/16 | Alamo | Stone Valley Rd x Alamo Glen Dr | American Crow |
| 9 | 8/7/16 | Alamo | Camino Sobrante x Orinda Wy | American Crow |
| 10 | 8/8/16 | Brentwood | Balfour Rd x Fairview Ave | American Crow |
| 11 | 8/9/16 | Concord | Glazier Dr x Armand Dr | American Crow |
| 12 | 8/9/16 | Antioch | Lone Tree Wy x Deer Valley Rd | Western Scrub Jay |
| 13 | 8/18/16 | Pleasant Hill | Geary Rd x Pleasant Hill Rd | American Crow |
| 14 | 8/19/16 | Oakley | Lakespring Dr x Beaulieu Ln | Western Scrub Jay |
| 15 | 8/23/16 | Danville | Verona Ave x Love Ln | American Crow |
| 16 | 8/24/16 | Concord | Treat Blvd x Oak Grove Rd | American Crow |
| 17 | 8/25/16 | Concord | Michigan Blvd x Washington Blvd | American Crow |
| 18 | 8/30/16 | Concord | Treat Blvd x Oak Grove Rd | American Crow |
| 19 | 8/31/16 | Pleasant Hill | Hubbard Ave x Roberta Ave | Western Scrub Jay |
| 20 | 9/7/16 | Antioch | Taylor Wy x Silveria Wy | American Crow |
| 21 | 9/7/16 | Concord | Glazier Dr x Mercer Ct | American Crow |
| 22 | 9/8/16 | Concord | Denkinger Rd x Wilson Ln | American Crow |
| 23 | 9/14/16 | Concord | Bailey Rd x Clayton Rd | California Scrub Jay |
| 24 | 9/16/16 | Walnut Creek | Primrose Ln x Peachwillow Ln | American Crow |
| 25 | 9/20/16 | Martinez | Morello Ave x Morello Hills Dr | American Crow |
| 26 | 9/22/16 | Concord | Clayton Rd x Bailey Rd | American Crow |
| 27 | 9/28/16 | Concord | Mendocino Dr x Salem St | American Crow |
| 28 | 10/3/16 | Danville | Old Farm Rd x Contada Cir | American Crow |
| 29 | 10/4/16 | Danville | Green Valley Rd x Blemer Rd | American Crow |
| 30 | 10/7/16 | Walnut Creek | Oak Grove Rd x Peachwillow Ln | American Crow |
| 31 | 10/10/16 | Walnut Creek | Los Felicias Ave x San Antonio Dr | American Crow |
| 32 | 10/11/16 | Walnut Creek | Naranja Dr x Walnut Ave | American Crow |
| 33 | 10/11/16 | Concord | Sunshine Dr x Meadow Ln | American Crow |
Sentinel Chicken Flocks: 2
| #/10 | Date Bleed | Area |
|---|---|---|
| 2/10 | 7/18/16 | Oakley |
| 1/10 | 8/1/16 | Holland Tract |
| 2/10 | 8/15/16 | Holland Tract |
Note: Chickens do not die from West Nile virus. They develop antibodies to the virus which is detected in their blood.
Horses: 0
| n | Date Reported | City | Dead/Euthanized |
|---|---|---|---|