Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 14, Number 5—May 2008

Research

Efficacy of Aerial Spraying of Mosquito Adulticide in Reducing Incidence of West Nile Virus, California, 2005

Ryan M. Carney*1Comments to Author , Stan Husted*, Cynthia Jean*, Carol Glaser*, and Vicki Kramer†
Author affiliations: *California Department of Public Health, Richmond, California, USA; †California Department of Public Health, Sacramento, California, USA;

Main Article

Table 1

Number of human cases of infection with West Nile virus by location and temporal classification, California, 2005*

Area† Total Pretreatment‡ Posttreatment§ Postincubation¶ Population#
Treated, northern 34 28 6 0 221,828
Treated, southern 21 20 1 0 338,579
Buffer, northern 13 9 4 3 94,399
Buffer, southern 8 5 3 1 50,127
Untreated 76 41 35 18 518,566
Sacramento County 152 103 49 22 1,223,499
California 670 357 313 197 32,648,149

*Only cases with known date of onset of illness and location information (i.e., Sacramento County at the address level and California at the county level) are included in the analysis.
†California excluding Sacramento County.
‡Refers to cases with onset of illness up to and including the last date that aerial adulticiding was conducted (ending 22 Aug for the southern treated area and southern buffer zone and 10 Aug for all other areas).
§Refers to cases with onset of illness after the last date that aerial adulticiding was conducted (beginning 23 Aug for the southern treated area and southern buffer zone and 11 Aug for all other areas).
¶Refers to cases with onset of illness >14 days after the first date that aerial adulticiding was conducted (beginning 4 Sep for the southern treated area and southern buffer zone and 23 Aug for all other areas).
#Population data source: UA Census 2000 TIGER/Line data made available in shapefile format through Environmental Systems Research Institute, Inc. (Redlands, CA, USA) (20).

Main Article

1Current affiliation: Yale University School of Medicine, New Haven, Connecticut, USA

Top of Page

USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO