2014 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.

May contain: cutlery, spoon, chart, and plot

For information regarding human cases, please click here.

Mosquito Samples: 25

n	Date Collected	City	Cross Streets	Species
1	6/23/14	Knightsen	Holland Tract Area	Culex tarsalis
2	7/7/14	Discovery Bay	Cherry Hills Drive	Culex pipiens
3	7/7/14	Martinez	I-680 x Waterfront Road	Culex tarsalis
4	7/14/14	Discovery Bay	Cherry Hills Drive x Marina Road	Culex pipiens
5	7/16/14	Discovery Bay	Bixler Road x Balfour Road	Culex pipiens
6	7/17/14	Discovery Bay	Cherry Hills Drive x Wayfarer Drive	Culex tarsalis
7	7/23/14	Discovery Bay	Byron Tract Levee	Culex tarsalis
8	8/6/14	Discovery Bay	Point of Timber Road x Bixler Road	Culex pipiens
9	8/12/14	Discovery Bay	Highway 4 x Western Farms Ranch Road	Culex pipiens
10	8/13/14	Concord	David Avenue x Cayce Court	Culex tarsalis
11	8/19/14	Discovery Bay	Byron Tract SE	Culex pipiens
12	8/19/14	Discovery Bay	Byron Tract NW	Culex pipiens
13	8/19/14	Discovery Bay	Byron Tract NW	Culex tarsalis
14	8/19/14	Discovery Bay	Byron Tract NW	Culex tarsalis
15	8/20/14	Discovery Bay	Bixler Road x Point of Timber Road	Culex pipiens
16	8/18/14	Discovery Bay	Cherry Hills Drive	Culex pipiens
17	8/25/14	Discovery Bay	Byron Tract NW	Culex pipiens
18	8/26/14	Discovery Bay	Bixler Rd. x Point of Timber Rd.	Culex pipiens
19	8/27/14	Discovery Bay	Willow Lake Rd. x Beaver Ln.	Culex pipiens
20	9/11/14	Brentwood	Orwood Tract	Culex pipiens
21	9/16/14	Discovery Bay	Agricultural Area	Culex pipiens
22	9/22/14	Discovery Bay	Byron Tract NW	Culex tarsalis
23	10/6/14	Discovery Bay	Byron Tract NW	Culex pipiens
24	10/13/14	Knightsen	Holland Tract Area	Culex tarsalis
25	10/13/14	Pittsburg	Willow Pass Rd. x Enterprise Cir.	Culex tarsalis

Dead Birds: 44

n	Date Reported	City	Cross Streets	Species
1	4/23/14	Alamo	Danville Blvd. x Camille Ave.	American Crow
2	5/18/14	Pleasant Hill	Monument Blvd. x Mohr Ln.	American Crow
3	6/9/14	San Ramon	Norris Canyon Rd. x Bollinger Canyon Rd.	American Crow
4	6/14/14	Oakley	Empire Ave. x Main St.	American Crow
5	6/17/14	Oakley	Empire Ave. x Hemlock Dr.	American Crow
6	6/17/14	Oakley	Empire Ave. x Hemlock Dr.	American Crow
7	6/20/14	Brentwood	Lone Tree Wy x O'Hara Ave.	American Crow
8	6/25/14	Antioch	Hillcrest Ave. x Sunset. Dr.	American Crow
9	6/26/14	San Ramon	Bollinger Canyon Rd. x Norris Canyon Rd.	American Crow
10	7/2/14	Bethel Island	Bethel Island Rd. x Gateway Rd.	American Crow
11	7/9/14	Walnut Creek	Arroyo Wy. x N. Broadway	American Crow
12	7/10/14	Oakley	Kay Ave. x O'Hara Ave.	Western Scrub Jay
13	7/13/14	Antioch	Camby Rd. x G St.	Western Scrub Jay
14	7/14/14	Brentwood	Foothill Dr. x Balfour Rd.	American Crow
15	7/16/14	Danville	Hartford Rd. x Danville Blvd.	American Crow
16	7/17/14	Antioch	Hargrove St. x E. 18th St.	American Crow
17	7/17/14	Brentwood	Minnesota Ave. x Windmeadows Dr.	Western Scrub Jay
18	7/21/14	Antioch	Judsonville Dr. x Hansen Dr.	Western Scrub Jay
19	7/23/14	Concord	Bancroft Rd. x Hookston Rd.	Western Scrub Jay
20	7/29/14	Pinole	Mann Drive X Appian Way	Western Scrub Jay
21	8/6/14	Concord	Ryan Road x Wilmore Avenue	American Crow
22	8/6/14	Alamo	Stone Valley Road x Roundhill Road	American Crow
23	8/7/14	Danville	Montcrest Place x Love Lane	Western Scrub Jay
24	8/7/14	Discovery Bay	Cherry Hills Dr. x Wayfarer Dr.	American Crow
25	8/10/14	Concord	David Ave. x Getoun Dr.	American Crow
26	8/11/14	Brentwood	Burghley Ln. x Centennial Dr.	American Crow
27	8/20/14	Concord	Treat Blvd. x San Simeon Dr.	American Crow
28	8/21/14	Walnut Creek	Oak Rd. x Jones Rd.	American Crow
29	8/21/14	Concord	Whitman Rd. x W Gilardy Dr.	American Crow
30	8/27/14	Walnut Creek	Bancroft Rd. x Treat Blvd.	American Crow
31	8/28/14	Danville	Harlan Dr. x St. Helena Dr.	American Crow
32	9/2/14	Walnut Creek	Walnut Ave. x Warwick Dr.	Western Scrub Jay
33	9/2/14	Oakley	Empire Ave. x Truman Ln.	American Crow
34	9/2/14	Brentwood	Forest View Common x Central Blvd.	American Crow
35	9/4/14	Brentwood	Payne Ave. x Walnut Blvd.	Western Scrub Jay
36	9/8/14	San Ramon	Broadmoor Dr. x Pine Valley Rd.	American Crow
37	9/8/14	Orinda	Altamount Dr. x Moraga Wy.	Stellar's Jay
38	9/12/14	Danville	Verona Ave. x Love Ln.	American Crow
39	9/15/14	San Ramon	Ascot Dr. x Broadmoor Dr.	American Crow
40	9/21/14	Danville	Camino Ramon x El Capitan Dr.	American Crow
41	9/24/14	Discovery Bay	Clubhouse Dr. x Edgeview Dr.	American Crow
42	9/29/14	Martinez	Glacier Dr. x Olympic Dr.	Western Scrub Jay
43	10/8/14	Alamo	Royal Oaks Dr. x Peake Pl.	American Crow
44	10/12/14	Danville	Camino Ramon x Joaquin Dr.	American Crow

Sentinel Chicken Flocks: 3

#/10	Date Bleed	Area
1/10	6/16/14	Holland Tract
3/10	6/30/14	Holland Tract
1/10	7/14/14	Holland Tract
1/10	7/14/14	Oakley
1/10	7/28/14	Holland Tract
1/10	8/11/14	Holland Tract
1/10	8/11/14	Oakley
3/10	8/11/14	Walnut Creek
1/10	8/25/14	Walnut Creek
1/10	9/22/14	Holland Tract
1/10	10/20/14	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
1	9/17/15	Brentwood	No

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