2010 West Nile Virus Activity

The Sacramento-Yolo Mosquito and Vector Control District's ongoing surveillance program has detected West Nile virus activity in Sacramento or Yolo counties in 2010. Archived data is available for 2007 activity, 2008, and 2009.

As of September 5th, 2010, the District is operating at Response Level 4 of the Mosquito and Mosquito-Borne Disease Management Plan.
Download a PDF of the West Nile Risk Assessment for 8/6/2010

West Nile virus positives as of September 3rd, 2010:
Sacramento
County		Yolo
County		Total
Humans505
Horses202
Sentinel Animals303
Mosquito Samples1774181
Dead Birds989107

Click here for a map of these locations

Below you will find the breakdown of West Nile virus activity

Humans tested positive for West Nile virus:
ReportedCountyCityZip Code
08/05/2010SacramentoNot ReportedNot Reported
08/05/2010SacramentoNot ReportedNot Reported
09/03/2010SacramentoNot ReportedNot Reported
09/03/2010SacramentoNot ReportedNot Reported
09/03/2010SacramentoNot ReportedNot Reported

Horses tested positive for West Nile virus:
ReportedCountyCityZip Code
08/10/2010SacramentoWilton95693
08/23/2010SacramentoWilton95693

Sentinel animals tested positive for West Nile virus:
TestedCountyCityZip Code
08/02/2010SacramentoHood
08/09/2010SacramentoWilton95693
08/09/2010SacramentoWilton95693

Mosquito Samples tested positive for West Nile virus:
CollectedCountyCityZip CodeSpecies
06/25/2010SacramentoSacramento95828Cx pipiens (50)
06/25/2010SacramentoSacramento95829Cx tarsalis (22)
06/30/2010SacramentoSacramento95838Cx pipiens (20)
06/30/2010SacramentoElk Grove95829Cx tarsalis (16)
06/30/2010SacramentoSacramento95829Cx pipiens (28)
06/30/2010SacramentoSacramento95828Cx tarsalis (16)
07/02/2010SacramentoSacramento95828Cx pipiens (23)
07/02/2010SacramentoSacramento95829Cx tarsalis (24)
07/06/2010SacramentoSacramento95841Cx tarsalis (9)
07/06/2010SacramentoSacramento95841Cx pipiens (23)
07/06/2010SacramentoSacramento95838Cx pipiens (50)
07/08/2010SacramentoElk Grove95624Cx tarsalis (16)
07/08/2010SacramentoElk Grove95624Cx tarsalis (50)
07/08/2010SacramentoElk Grove95624Cx pipiens (50)
07/08/2010SacramentoElk Grove95624Cx pipiens (12)
07/08/2010SacramentoElk Grove95758Cx tarsalis (9)
07/08/2010SacramentoElk Grove95758Cx pipiens (9)
07/08/2010SacramentoElk Grove95758Cx pipiens (1)
07/09/2010SacramentoSacramento95829Cx tarsalis (25)
07/09/2010SacramentoSacramento95829Cx pipiens (16)
07/09/2010SacramentoSacramento95829Cx pipiens (1)
07/09/2010SacramentoSacramento95829Cs incidens (9)
07/09/2010SacramentoElk Grove95829Cx tarsalis (10)
07/09/2010SacramentoSacramento95829Cx tarsalis (3)
07/09/2010SacramentoSacramento95829Cx pipiens (5)
07/09/2010SacramentoSacramento95828Cx tarsalis (24)
07/09/2010SacramentoSacramento95828Cx pipiens (5)
07/09/2010SacramentoSacramento95828Cx pipiens (50)
07/09/2010SacramentoSacramento95828Cx pipiens (18)
07/09/2010SacramentoSacramento95841Cx pipiens (12)
07/12/2010SacramentoSacramento95841Cx pipiens (50)
07/12/2010SacramentoSacramento95838Cx tarsalis (40)
07/12/2010SacramentoSacramento95838Cx pipiens (50)
07/12/2010SacramentoElk Grove95757Cx pipiens (50)
07/12/2010SacramentoElk Grove95757Cx pipiens (50)
07/12/2010SacramentoElk Grove95624Cx tarsalis (42)
07/12/2010SacramentoElk Grove95624Cx pipiens (3)
07/12/2010SacramentoElk Grove95624Cx tarsalis (49)
07/12/2010SacramentoSacramento95823Cx tarsalis (13)
07/12/2010SacramentoSacramento95829Cx tarsalis (36)
07/12/2010SacramentoSacramento95823Cx tarsalis (40)
07/12/2010SacramentoElk Grove95624Cx tarsalis (50)
07/12/2010SacramentoElk Grove95624Cx pipiens (50)
07/12/2010SacramentoElk Grove95624Cx pipiens (1)
07/12/2010SacramentoElk Grove95624Cx tarsalis (14)
07/14/2010SacramentoSacramento95828Cx pipiens (26)
07/14/2010SacramentoSacramento95829Cx tarsalis (1)
07/14/2010SacramentoElk Grove95624Cx tarsalis (39)
07/14/2010SacramentoElk Grove95624Cx pipiens (1)
07/14/2010SacramentoElk Grove95829Cx tarsalis (25)
07/14/2010SacramentoElk Grove95829Cx pipiens (4)
07/14/2010SacramentoSacramento95829Cx tarsalis (32)
07/14/2010SacramentoSacramento95829Cx pipiens (7)
07/14/2010SacramentoSacramento95828Cx tarsalis (14)
07/15/2010SacramentoSacramento95838Cx pipiens (20)
07/15/2010SacramentoRancho Cordova95670Cx tarsalis (6)
07/19/2010SacramentoSacramento95829Cx tarsalis (34)
07/19/2010SacramentoSacramento95823Cx tarsalis (50)
07/19/2010SacramentoSacramento95823Cx tarsalis (41)
07/19/2010SacramentoSacramento95823Cx pipiens (22)
07/19/2010SacramentoElk Grove95624Cx tarsalis (7)
07/19/2010SacramentoElk Grove95624Cx tarsalis (14)
07/19/2010SacramentoElk Grove95624Cx pipiens (3)
07/19/2010SacramentoSacramento95829Cx tarsalis (13)
07/19/2010SacramentoElk Grove95829Cx tarsalis (15)
07/19/2010SacramentoElk Grove95829Cx pipiens (4)
07/19/2010SacramentoSacramento95818Cx pipiens (28)
07/19/2010SacramentoSacramento95841Cx pipiens (26)
07/19/2010SacramentoCitrus Heights95621Cx tarsalis (32)
07/19/2010SacramentoSacramento95838Cx tarsalis (50)
07/19/2010SacramentoCarmichael95841Cx tarsalis (17)
07/19/2010SacramentoCarmichael95841Cx pipiens (50)
07/19/2010SacramentoCarmichael95841Cx pipiens (13)
07/19/2010SacramentoCarmichael95841Cx pipiens (9)
07/19/2010SacramentoCitrus Heights95621Cx tarsalis (28)
07/19/2010SacramentoRancho Cordova95670Cx pipiens (50)
07/19/2010SacramentoRancho Cordova95670Cx pipiens (10)
07/19/2010SacramentoSacramento95838Cx tarsalis (50)
07/19/2010SacramentoSacramento95838Cx tarsalis (5)
07/19/2010SacramentoSacramento95838Cx pipiens (42)
07/19/2010SacramentoRancho Cordova95826Cx tarsalis (23)
07/21/2010SacramentoElk Grove95624Cx tarsalis (22)
07/21/2010SacramentoElk Grove95829Cx tarsalis (16)
07/21/2010SacramentoSacramento95828Cs incidens (13)
07/21/2010SacramentoCitrus Heights95621Cx tarsalis (2)
07/21/2010SacramentoSacramento95842Cx tarsalis (7)
07/21/2010SacramentoHerald95632Cx pipiens (7)
07/21/2010YoloDavis95616Cx tarsalis (19)
07/23/2010SacramentoCitrus Heights95621Cx pipiens (9)
07/23/2010SacramentoRancho Cordova95670Cx pipiens (34)
07/23/2010SacramentoRancho Cordova95670Cx pipiens (3)
07/23/2010SacramentoAntelope95843Cx pipiens (1)
07/23/2010SacramentoFair Oaks95628Cx pipiens (13)
07/23/2010SacramentoCitrus Heights95610Cx tarsalis (10)
07/23/2010SacramentoCitrus Heights95610Cx tarsalis (5)
07/23/2010SacramentoSacramento95842Cx tarsalis (9)
07/23/2010SacramentoSacramento95842Cx tarsalis (2)
07/23/2010SacramentoAntelope95843Cx pipiens (50)
07/23/2010SacramentoAntelope95843Cx pipiens (50)
07/23/2010SacramentoSacramento95841Cx tarsalis (21)
07/23/2010SacramentoSacramento95838Cx tarsalis (12)
07/23/2010SacramentoSacramento95838Cx pipiens (50)
07/26/2010SacramentoRancho Cordova95742Cx tarsalis (22)
07/26/2010SacramentoSacramento95829Cx tarsalis (6)
07/26/2010SacramentoSacramento95823Cx pipiens (28)
07/26/2010SacramentoSacramento95828Cx pipiens (1)
07/26/2010SacramentoSacramento95829Cx tarsalis (12)
07/26/2010SacramentoSacramento95829Cx pipiens (13)
07/26/2010SacramentoElk Grove95829Cx tarsalis (30)
07/26/2010SacramentoElk Grove95829Cx pipiens (38)
07/26/2010SacramentoElk Grove95624Cx pipiens (4)
07/26/2010SacramentoSacramento95829Cx tarsalis (24)
07/26/2010SacramentoSacramento95829Cx pipiens (13)
07/26/2010SacramentoElk Grove95624Cx tarsalis (23)
07/26/2010SacramentoSacramento95829Cx tarsalis (20)
07/28/2010SacramentoCitrus Heights95621Cx pipiens (25)
07/28/2010SacramentoAntelope95843Cx pipiens (21)
07/28/2010SacramentoCitrus Heights95621Cx pipiens (3)
07/28/2010SacramentoFair Oaks95628Cx pipiens (43)
07/28/2010SacramentoCarmichael95608Cx tarsalis (12)
07/28/2010SacramentoRancho Cordova95670Cx tarsalis (2)
07/28/2010SacramentoRio Linda95673Cx tarsalis (12)
07/30/2010SacramentoElk Grove95624Cx tarsalis (8)
07/30/2010SacramentoElk Grove95624Cx pipiens (23)
07/30/2010SacramentoRancho Cordova95826Cx tarsalis (3)
08/02/2010SacramentoRio Linda95673Cx tarsalis (6)
08/02/2010SacramentoCarmichael95608Cx pipiens (1)
08/02/2010SacramentoSacramento95838Cx pipiens (50)
08/02/2010SacramentoCitrus Heights95610Cx pipiens (3)
08/02/2010SacramentoCitrus Heights95621Cx pipiens (16)
08/02/2010SacramentoCitrus Heights95621Cx tarsalis (15)
08/04/2010SacramentoSacramento95827Cx pipiens (4)
08/04/2010SacramentoRancho Cordova95670Cx pipiens (4)
08/04/2010SacramentoRancho Cordova95655Cx pipiens (50)
08/04/2010SacramentoAntelope95843Cx pipiens (50)
08/04/2010SacramentoFair Oaks95628Cx tarsalis (1)
08/04/2010SacramentoWilton95693Cx pipiens (10)
08/06/2010SacramentoCarmichael95608Cx pipiens (7)
08/06/2010SacramentoSacramento95864Cx pipiens (9)
08/10/2010SacramentoRancho Cordova95670Cx pipiens (8)
08/10/2010SacramentoRancho Cordova95670Cx pipiens (18)
08/10/2010SacramentoSacramento95838Cx tarsalis (27)
08/10/2010SacramentoSacramento95838Cx pipiens (47)
08/10/2010SacramentoFair Oaks95608Cx tarsalis (1)
08/10/2010SacramentoFair Oaks95628Cx pipiens (5)
08/10/2010SacramentoWilton95693Cx tarsalis (16)
08/12/2010SacramentoElverta95626Cx tarsalis (10)
08/12/2010SacramentoRio Linda95673Cx tarsalis (22)
08/12/2010SacramentoAntelope95843Cx pipiens (42)
08/18/2010SacramentoElk Grove95823Cx tarsalis (50)
08/18/2010SacramentoWilton95693Cx tarsalis (50)
08/18/2010SacramentoSacramento95838Cx tarsalis (43)
08/18/2010SacramentoSacramento95838Cx pipiens (44)
08/23/2010SacramentoWilton95693Cx tarsalis (41)
08/23/2010SacramentoWilton95693Cx pipiens (11)
08/23/2010SacramentoElk Grove95624Cx tarsalis (10)
08/23/2010SacramentoSacramento95828Cx tarsalis (13)
08/23/2010SacramentoRancho Cordova95670Cx pipiens (10)
08/25/2010SacramentoElk Grove95758Cx pipiens (30)
08/25/2010SacramentoWilton95693Cx tarsalis (27)
08/25/2010SacramentoElk Grove95758Cx pipiens (50)
08/25/2010SacramentoSacramento95823Cx tarsalis (50)
08/25/2010SacramentoRancho Cordova95742Cx tarsalis (17)
08/25/2010SacramentoSacramento95660Cx tarsalis (3)
08/25/2010SacramentoElverta95626Cx tarsalis (50)
08/25/2010SacramentoElverta95626Cx pipiens (5)
08/30/2010SacramentoSacramento95660Cx tarsalis (4)
08/30/2010SacramentoSacramento95820Cx pipiens (17)
08/30/2010SacramentoSacramento95816Cx pipiens (50)
08/30/2010SacramentoSacramento95864Cx pipiens (7)
08/30/2010YoloZamora95698Cx tarsalis (51)
09/01/2010SacramentoElk Grove95823Cx tarsalis (50)
09/01/2010SacramentoElk Grove95823Cx tarsalis (46)
09/01/2010YoloDavis95616Cx tarsalis (26)
09/01/2010YoloDavis95616Cx pipiens (1)
09/03/2010SacramentoSacramento95823Cx tarsalis (22)
09/03/2010SacramentoSacramento95823Cx pipiens (16)
09/03/2010SacramentoElk Grove95624Cx pipiens (34)
09/03/2010SacramentoSacramento95826Cx pipiens (17)
09/03/2010SacramentoAntelope95843Cx pipiens (50)
09/03/2010SacramentoSacramento95835Cx tarsalis (2)

Dead birds tested positive for West Nile virus:
CollectedCountyCityZip CodeSpecies
06/15/2010SacramentoSacramento95826American Crow
06/17/2010SacramentoSacramento95826American Crow
06/22/2010SacramentoFolsom95630Western Scrub-Jay
06/25/2010SacramentoSacramento95841Yellow-billed Magpie
06/30/2010SacramentoElk Grove95624Western Scrup-Jay
06/30/2010SacramentoElk Grove95757American Robin
07/02/2010SacramentoElk Grove95624American Crow
07/06/2010SacramentoElk Grove95624Yellow-billed Magpie
07/07/2010YoloWest Sacramento95605Western Scrub-Jay
07/07/2010YoloWoodland95695American Crow
07/07/2010SacramentoSacramento95838American Crow
07/08/2010YoloDavis95616American Crow
07/08/2010SacramentoRancho Cordova95670American Robin
07/08/2010SacramentoElk Grove95624American Crow
07/08/2010SacramentoOakley94561American Crow
07/08/2010YoloDavis95616Western Scrub-Jay
07/09/2010SacramentoSacramento95828Western Scrub-Jay
07/09/2010SacramentoSacramento95826Yellow-billed Magpie
07/09/2010SacramentoElk Grove95624American Crow
07/09/2010SacramentoElk Grove95624American Crow
07/09/2010SacramentoSacramento95831Western Scrb Jay Juv
07/09/2010SacramentoAntelope95843American Crow
07/12/2010SacramentoRancho Cordova95742Red-winged Blackbird
07/12/2010SacramentoRancho Cordova95670American Crow
07/12/2010SacramentoHerald95638Western Scrub Jay
07/13/2010SacramentoSacramento95864American Crow
07/13/2010SacramentoSacramento95827American Crow
07/13/2010SacramentoSacramento95842Western Scrub-Jay
07/13/2010SacramentoSacramento95819American Crow
07/13/2010SacramentoCarmichael95608Western Scrub-Jay
07/13/2010SacramentoSacramento95826American Crow
07/13/2010SacramentoSacramento95819American Crow
07/13/2010SacramentoRio Linda95673Western Scrub Jay
07/14/2010SacramentoSacramento95826House Finch
07/14/2010SacramentoSacramento95826American Crow
07/14/2010SacramentoMather95655Western Scrub-Jay
07/15/2010SacramentoSacramento95841Western Scrub Jay
07/15/2010YoloWoodland95695American Crow
07/15/2010SacramentoSacramento95819American Crow
07/15/2010SacramentoSacramento95829Yellow-billed Magpie
07/19/2010SacramentoSacramento95814American Crow
07/20/2010SacramentoElk Grove95624American Crow
07/20/2010SacramentoElk Grove95624Western Scrub-Jay
07/20/2010SacramentoSacramento95823American Crow
07/20/2010SacramentoCarmichael95608American Robin
07/20/2010SacramentoAntelope95843Western Scrub-Jay
07/20/2010SacramentoSacramento95826American Crow
07/20/2010SacramentoElk Grove95624American Crow
07/20/2010SacramentoElk Grove95624Western Scrub Jay
07/20/2010SacramentoRio Linda95673WESTERN SCRUB JAY
07/21/2010SacramentoElk Grove95624American Crow
07/21/2010SacramentoSacramento95819American Crow
07/21/2010SacramentoSacramento95826American Crow
07/21/2010SacramentoCitrus Heights95621American Crow
07/21/2010SacramentoCarmichael95608American Crow
07/22/2010SacramentoCitrus Heights95621American Crow
07/23/2010SacramentoElk Grove95624Yellow-billed Magpie
07/23/2010SacramentoElk Grove95624Western Scrub-Jay
07/26/2010SacramentoWilton95693Western Scrub-Jay
07/26/2010SacramentoWilton95693Western Scrub-Jay
07/26/2010SacramentoSacramento95826American Crow
07/27/2010SacramentoWilton95693Western Scrub-Jay
07/27/2010SacramentoAntelope95843House Finch
07/28/2010SacramentoCitrus Heights95621Western Scrub-Jay
07/28/2010SacramentoSacramento95826American Crow
07/28/2010SacramentoAntelope95843Western Scrub-Jay
07/29/2010SacramentoCitrus Heights95621American Robin Juv
07/29/2010SacramentoRancho Cordova95742American Crow
07/30/2010SacramentoSacramento95826Western ScrubJay Juv
07/30/2010SacramentoCarmichael95608Western Scrub-Jay
07/30/2010SacramentoCitrus Heights95621Yellow-billed Magpie
08/02/2010SacramentoRancho Cordova95670American Crow
08/02/2010SacramentoSacramento95864Western Scrub-Jay
08/02/2010SacramentoSacramento95814American Crow
08/02/2010SacramentoRio Linda95673American Crow
08/02/2010SacramentoCarmichael95608American Crow
08/02/2010SacramentoFair Oaks95628Yellow-billed Magpie
08/02/2010SacramentoNorth Highlands95660American Crow
08/03/2010SacramentoWilton95693AMERICAN CROW
08/03/2010SacramentoWilton95693AMERICAN CROW
08/03/2010SacramentoCitrus Heights95610AMERICAN CROW
08/03/2010SacramentoElk Grove95757American Crow
08/03/2010SacramentoCitrus Heights95621House Finch
08/03/2010SacramentoSacramento95838American Crow
08/05/2010SacramentoSacramento95825Yellow-billed Magpie
08/09/2010YoloDavis95616Western Scrub Jay
08/09/2010YoloDavis95616American Crow
08/10/2010SacramentoElverta95626American Crow
08/11/2010SacramentoSacramento95826House Finch
08/16/2010SacramentoRancho Cordova95670Western Scrub-Jay
08/16/2010SacramentoSacramento95814American Crow
08/16/2010SacramentoSacramento95819American Crow
08/16/2010SacramentoSacramento95819American Crow
08/16/2010SacramentoSacramento95814American Crow
08/19/2010YoloDunnigan95937American Crow
08/19/2010SacramentoRancho Cordova95670Yellow-billed Magpie
08/19/2010SacramentoSacramento95823American Crow
08/19/2010SacramentoElk Grove95624American Crow
08/20/2010SacramentoElk Grove95624Western Scrub-Jay
08/24/2010SacramentoSacramento95838American Crow
08/26/2010SacramentoCitrus Heights95621American Crow
08/27/2010SacramentoCitrus Heights95610Yellow-billed Magpie
08/30/2010SacramentoCarmichael95608American Crow
08/31/2010SacramentoSacramento95834American Crow
09/01/2010SacramentoSacramento95817American Crow
09/01/2010SacramentoWilton95693American Crow
09/01/2010YoloDavis95616Western Scrub-Jay


If you see a bird, particularly a crow or magpie, lacking signs of trauma that has been dead for less than 24 hours, please call 1-877-WNV-BIRD (1-877-968-2473) or report it online here. Crows and magpies are particularly susceptible to the disease, so they make excellent early warning sentinels for virus activity in our area.

 

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