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Aedes Aegypti Larval Indices and Risk for Dengue Epidemics

Overview
Journal Emerg Infect Dis
Specialty Infectious Diseases
Date 2006 May 18
PMID 16704841
Citations 87
Authors
Lizet Sanchez
Veerle Vanlerberghe
Lazara Alfonso
Maria Del Carmen Marquetti
Maria Guadalupe Guzman
Juan Bisset
Patrick Van der Stuyft
Affiliations
Soon will be listed here.
Abstract

We assessed in a case-control study the test-validity of Aedes larval indices for the 2000 Havana outbreak. "Cases" were blocks where a dengue fever patient lived during the outbreak. "Controls" were randomly sampled blocks. Before, during, and after the epidemic, we calculated Breteau index (BI) and house index at the area, neighborhood, and block level. We constructed receiver operating characteristic (ROC) curves to determine their performance as predictors of dengue transmission. We observed a pronounced effect of the level of measurement. The BI(max) (maximum block BI in a radius of 100 m) at 2-month intervals had an area under the ROC curve of 71%. At a cutoff of 4.0, it significantly (odds ratio 6.00, p<0.05) predicted transmission with 78% sensitivity and 63% specificity. Analysis of BI at the local level, with human-defined boundaries, could be introduced in control programs to identify neighborhoods at high risk for dengue transmission.

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