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Volume 18, Number 1—January 2012
Dispatch

Dengue Outbreak in Key West, Florida, USA, 2009

Elizabeth G. Radke, Christopher J. Gregory, Kristina W. Kintziger, Erin K. Sauber-Schatz, Elizabeth Hunsperger, Glen R. Gallagher, Jean M. Barber, Brad J. Biggerstaff, Danielle R. Stanek, Kay M. Tomashek, and Carina G.M. BlackmoreComments to Author 
Author affiliations: Florida Department of Health, Tallahassee, Florida, USA (E.G. Radke, K.W. Kintziger, E.K. Sauber-Schatz, D.R. Stanek, C.G.M. Blackmore); Centers for Disease Control and Prevention, San Juan, Puerto Rico (C.J. Gregory, E.A. Hunsperger, G.R. Gallagher, K.M. Tomashek); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (E.K. Sauber-Schatz); Monroe County Health Department, Key West, Florida, USA (J.M. Barber); Centers for Disease Control and Prevention, Fort Collins, CO, USA (B.J. Biggerstaff)

Main Article

Table

Risk factors associated with laboratory-positive dengue virus infection among residents of Key West, Florida, USA, according to household survey, September 2009*

Variable No. (%)† persons with infection, n = 13 No. (%) persons without recent infection, n = 227 Crude OR (90% CI)‡
Bird bath in yard 5 (41) 26 (11) 5.6 (1.5–21.3)
Windows open >50% of the time 5 (41) 37 (15) 3.9 (1.1–14.0)
Vegetation covers >50% of yard 8 (59) 61 (30) 3.4 (1.0–11.2)
Outside in evenings 11 (86) 149 (67) 3.1 (1.0–9.5)
Bitten by mosquito at work/school 5 (32) 28 (14) 3.0 (1.1–8.2)
Uses repellent containing DEET 3 (20) 98 (41) 0.4 (0.1– 0.9)
Uses mosquito bite prevention measures 4 (26) 119 (52) 0.3 (0.1–0.7)
Air conditioning on >50% of time 6 (37) 170 (75) 0.2 (0.1– 0.6)
Traveled outside Florida in past 3 mo 2 (12) 93 (38) 0.2 (0.1–0.9)
Empties water from containers regularly 1 (6) 79 (36) 0.1 (0.0–0.7)

*OR, odds ratio; DEET, N,N-diethyl-m-toluamide.
†Weighted percentages are reported, reflecting the stratified, 1-stage cluster sampling design. Responses were weighted to account for the different probabilities of household inclusion across strata, within-household participation rates, and interhousehold clustering of infections.
‡Significance level, p = 0.10. Weighted logistic regression models were used to assess risk factors for recent infection, and CIs were based on the modeling accounted for the sampling design.

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Page created: December 22, 2011
Page updated: December 22, 2011
Page reviewed: December 22, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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