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. 2012 May;86(5):895-901.
doi: 10.4269/ajtmh.2012.11-0502.

Modifiable risk factors for West Nile virus infection during an outbreak--Arizona, 2010

Katherine B Gibney  1 , James Colborn, Steven Baty, Andrean M Bunko Patterson, Tammy Sylvester, Graham Briggs, Tasha Stewart, Craig Levy, Ken Komatsu, Katherine MacMillan, Mark J Delorey, John-Paul Mutebi, Marc Fischer, J Erin Staples
Affiliations

Modifiable risk factors for West Nile virus infection during an outbreak--Arizona, 2010

Katherine B Gibney et al. Am J Trop Med Hyg. 2012 May.

Abstract

West Nile virus (WNV) is the leading cause of mosquito-borne disease in the United States; however, risk factors for infection are poorly defined. We performed a case-control study to identify modifiable risk factors for WNV infection. Case-patients (N = 49) had laboratory evidence of recent WNV infection, whereas control-subjects (N = 74) had negative WNV serology. We interviewed participants, surveyed households, and assessed environmental data. WNV infection was associated with living in or near Water District X within Gilbert Township (adjusted odds ratio [aOR] 5.2; 95% confidence interval [95% CI] = 1.5-18.1), having water-holding containers in their yard (aOR 5.0; 95% CI = 1.5-17.3), and not working or attending school outside the home (aOR 2.4; 95% CI = 1.1-5.5). During this outbreak, WNV infection was likely primarily acquired peri-domestically with increased risk associated with potential mosquito larval habitats around the home and neighborhood.

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Figures

Figure 1.
Figure 1.
Enrollment and household visits of residents of the East Valley of metropolitan Phoenix, Arizona evaluated for West Nile virus (WNV) infection on specimens collected May 25–July 31, 2010.
Figure 2.
Figure 2.
Map of West Nile virus case-patients and control-subjects by place of residence—East Valley of metropolitan Phoenix, Arizona, May 25–July 31, 2010. Based on the estimated population density, 150 m buffer were created around each residence and then a point was randomly chosen within the buffer to protect individual privacy.
See this image and copyright information in PMC

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