2013 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: 13
| n | Date Collected | City | Cross Streets | Species |
|---|---|---|---|---|
| 1 | 6/27/13 | Discovery Bay | Bixler Rd. x Point of Timber Rd. | tarsalis |
| 2 | 7/1/13 | Discovery Bay | Bixler Rd. x Point of Timber Rd. | tarsalis |
| 3 | 7/1/13 | Discovery Bay | Bixler Rd. x Point of Timber Rd. | pipiens |
| 4 | 7/8/13 | Discovery Bay | Cherry Hills Dr. | pipiens |
| 5 | 8/19/13 | Brentwood | Garin Pkwy. x Spruce St. | tarsalis |
| 6 | 8/20/13 | Brentwood | Garin Pkwy. x Sunset Rd. | tarsalis |
| 7 | 8/20/13 | Brentwood | Silverton Wy. x Cambrian Pl. | pipiens |
| 8 | 8/20/13 | Brentwood | Eastwood Ct. x St. Regis Ave. | pipiens |
| 9 | 8/20/13 | Brentwood | Garin Pkwy. x Spruce St. | pipiens |
| 10 | 8/21/13 | Brentwood | Garin Pkwy. x Spruce St. | tarsalis |
| 11 | 8/26/13 | Brentwood | Garin Pkwy. x Sunset Rd. | tarsalis |
| 12 | 8/26/13 | Brentwood | Garin Pkwy. x Sunset Rd. | pipiens |
| 13 | 9/16/13 | Antioch | 8th St. x A St. | tarsalis |
Dead Birds: 68
| n | Date Reported | City | Cross Streets | Species |
|---|---|---|---|---|
| 1 | 6/26/13 | Antioch | Yellowstone Dr. x Hillcrest Ave. | American Crow |
| 2 | 7/2/13 | Brentwood | Marsh Creek Rd. x Byron Hwy | American Crow |
| 3 | 7/8/13 | Brentwood | Balfour Rd. x Walnut Blvd. | American Crow |
| 4 | 7/10/13 | Concord | Concord Blvd. x Baily Rd. | American Crow |
| 5 | 7/12/13 | Alamo | Danville Blvd. x Camille Ave. | American Crow |
| 6 | 7/17/13 | Pittsburg | West Leland Rd. x Crestview Dr. | American Crow |
| 7 | 7/22/13 | Pittsburg | Railroad Ave. x Buchanan Rd. | American Crow |
| 8 | 7/21/13 | Concord | Clayton Rd. x Denkinger Rd. | American Crow |
| 9 | 7/22/13 | Brentwood | Sand Creek Rd. x Minnesota Ave. | American Crow |
| 10 | 7/22/13 | Oakley | Laurel Rd. x Main St. | American Crow |
| 11 | 7/11/13 | Antioch | West 11th St. x H St. | Western Scrub Jay |
| 12 | 7/28/13 | Walnut Creek | Buena Vista Ave. x 1st Ave. | American Crow |
| 13 | 7/18/13 | Antioch | Hillcrest Ave. x Via Dora Dr. | Western Scrub Jay |
| 14 | 7/29/13 | Pittsburg | Willow Pass Rd. x Seasons Dr. | Western Scrub Jay |
| 15 | 7/29/13 | Danville | Greenbrook Dr. x Camino Ramon | American Crow |
| 16 | 7/30/13 | Brentwood | Sunset Rd. x Byron Hwy | American Crow |
| 17 | 7/31/13 | Walnut Creek | Treat Blvd. x Bancroft Rd. | American Crow |
| 18 | 7/31/13 | Concord | Colfax St. x Clayton Rd. | American Crow |
| 19 | 7/31/13 | Danville | Greenbrook Dr. x Camino Ramon | American Crow |
| 20 | 8/1/13 | Walnut Creek | Walnut Ave. x Las Lomas Wy | Western Scrub Jay |
| 21 | 8/1/13 | Discovery Bay | Bixler Rd. x Marsh Creek Rd. | American Crow |
| 22 | 8/2/13 | Brentwood | Sunset Rd. x North Eden Plains Rd. | American Crow |
| 23 | 8/2/13 | Brentwood | Eagle Ln. x Byron Hwy | American Crow |
| 24 | 8/4/13 | Brentwood | 2nd St. x Brentwood Blvd. | American Crow |
| 25 | 8/5/13 | Discovery Bay | Bixler Rd. x Hwy 4 | American Crow |
| 26 | 8/5/13 | Pittsburg | Loveridge Rd. x Buchanan Rd. | American Crow |
| 27 | 7/24/13 | Brentwood | Fairview Ave. x Central Blvd. | American Crow |
| 28 | 7/24/13 | Brentwood | Balfour Rd. x Sellers Ave. | American Crow |
| 29 | 7/30/13 | Antioch | 8th St. x A St. | Red-Shouldered Hawk |
| 30 | 8/7/13 | Pittsburg | Meadows Ave. x Buchanan Rd. | American Crow |
| 31 | 8/6/13 | Walnut Creek | Buena Vista Ave. x 1st Ave. | American Crow |
| 32 | 8/7/13 | Brentwood | Balfour Rd. x Guthrie Ln. | American Crow |
| 33 | 8/8/13 | Martinez | Church St. x Pleasant Hill Rd. | Western Scrub Jay |
| 34 | 8/2/13 | Antioch | Delta Fair Blvd. x Belle Dr. | American Crow |
| 35 | 8/6/13 | Bethel Island | Piper Rd. x Gateway Rd. | Swainson's Hawk |
| 36 | 8/12/13 | Oakley | Oakley Rd. x Neroly Rd. | American Crow |
| 37 | 8/13/13 | Brentwood | O'Hara Ave. x Lone Tree Wy. | Western Scrub Jay |
| 38 | 8/14/13 | Brentwood | Chestnut St. x Garin Pkwy | American Crow |
| 39 | 8/15/13 | Concord | Clayton Rd. x Ygnacio Valley Rd | American Crow |
| 40 | 8/19/13 | Antioch | Sycamore St. x L St. | American Crow |
| 41 | 8/19/13 | Concord | Orange St. x Apple Dr. | American Crow |
| 42 | 8/19/13 | Martinez | Alhambra Valley Rd. x Vaca Creek Rd. | American Crow |
| 43 | 8/20/13 | Antioch | Prewett Ranch Dr. x Mokelumne Dr. | American Crow |
| 44 | 8/20/13 | Brentwood | Sycamore Ave. x Brentwood Blvd. | American Crow |
| 45 | 8/20/13 | Concord | Diamond Blvd. x Galaxy Wy. | American Crow |
| 46 | 8/21/13 | Walnut Creek | First Ave. Buena Vista Ave. | American Crow |
| 47 | 8/26/13 | Brentwood | Jennifer St. x Garin Pkwy. | American Crow |
| 48 | 8/14/13 | Brentwood | Newton Dr. x Apple Hill Dr. | Western Scrub Jay |
| 49 | 8/14/13 | Brentwood | Sand Creek Rd. x Highland Wy. | American Crow |
| 50 | 8/26/13 | Oakley | Quail Valley Run x Laurel Rd. | American Crow |
| 51 | 8/27/13 | Brentwood | Sellers Ave. x Sunset Rd. | American Crow |
| 52 | 8/27/13 | Concord | Kirker Pass Rd. x Concord Blvd. | American Crow |
| 53 | 8/28/13 | Pittsburg | W. Leland Rd. x Burton Ave. | Western Scrub Jay |
| 54 | 8/29/13 | Bethel Island | Sugar Barge Rd. x Riverview Dr. | American Crow |
| 55 | 8/21/13 | Brentwood | Sunset Rd. x Brentwood Blvd. | American Crow |
| 56 | 9/4/13 | Brentwood | Garin Pkwy. x Balfour Rd. | American Crow |
| 57 | 9/5/13 | Lafayette | Holland Dr. x Pleasant Hill Rd. | Western Scrub Jay |
| 58 | 9/5/13 | Danville | Bradford Pl. x Del Amigo Rd. | American Crow |
| 59 | 9/5/13 | Antioch | W 10th St. x L St. | American Crow |
| 60 | 9/5/13 | Danville | Diablo Rd. x El Cerro Blvd. | American Crow |
| 61 | 9/8/13 | Concord | Thornwood Dr. x Clayton Rd. | American Crow |
| 62 | 9/9/13 | Lafayette | Sweet Dr. x Carlyle Terr. | Western Scrub Jay |
| 63 | 9/18/13 | Brentwood | Eagle Rock Ave. x Foothill Dr. | Western Scrub Jay |
| 64 | 9/23/13 | Martinez | Center Ave. x Muir Rd. | American Crow |
| 65 | 10/1/13 | Walnut Creek | Beacon Ridge Ln. x Green Valley Dr. | Western Scrub Jay |
| 66 | 10/3/13 | Concord | Elario Ln. x Kaski Ln. | Western Scrub Jay |
| 67 | 10/4/13 | Pleasant Hill | Oak Park Blvd. x Pleasant Hill Rd. | American Crow |
| 68 | 10/11/13 | Alamo | Golden Grass Dr. x Stone Valley Rd | American Crow |
Sentinel Chicken Flocks: 3
| #/10 | Date Bleed | Area |
|---|---|---|
| 3/10 | 8/12/13 | Holland Tract |
| 1/10 | 8/12/13 | Oakley |
| 1/10 | 8/26/13 | Holland Tract |
| 1/10 | 9/9/13 | Holland Tract |
| 1/10 | 9/23/13 | Martinez |
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 |
|---|---|---|---|
| 1 | 9/17/15 | Brentwood | No |