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Volume 12, Number 5—May 2006

Research

Aedes aegypti Larval Indices and Risk for Dengue Epidemics

Lizet Sanchez*, Veerle Vanlerberghe†, Lázara Alfonso*, María del Carmen Marquetti*, María Guadalupe Guzman*, Juan Bisset*, and Patrick van der Stuyft†
Author affiliations: *Tropical Medicine Institute "Pedro Kouri," Havana, Cuba; †Institute of Tropical Medicine, Antwerp, Belgium

Main Article

Table 2

Mean BI for case and control blocks before, during, after the dengue outbreak, Playa Municipality, Havana, 2000*

Block July–August 2000 (before epidemic), mean (95% CI)
September–October 2000 (during epidemic), mean (95% CI)
November–December 2000 (after epidemic), mean (95% CI)
BI NBI BImax BI NBI BImax BI NBI BImax
September case blocks (n = 9) 0.53 (0.02–1.75) 1.52 (0.76–2.53) 6.28† (3.29–10.23) 11.95† (2.26–29.27) 10.75† (6.73–15.70) 28.4† (16.1–44.1) 0.63 (0.04–1.70) 0.64 (0.37–0.91) 2.94 (1.71–4.83)
October case blocks (n = 29) 0.29 (0.05–0.72) 1.01 (0.60–1.54) 4.24 (2.48–6.46) 1.39† (0.50–2.71) 3.16† (1.99–4.61) 12.2† (7.79–17.6) 0.66 (0.06–0.91) 0.76 (0.44–1.06) 2.87 (1.50–4.35)
Control blocks (n = 38) 0.20 (0.02–0.58) 0.69 (0.42–1.02) 2.96 (1.71–4.56) 0.42 (0.07–1.05) 1.52 (0.91–2.29) 1.52 (3.57–8.32) 0.33 (0.06–0.82) 0.68 (0.36–1.18) 2.34 (1.43–4.27)

*BI, Breteau index; CI, confidence interval; NBI, neighborhood BI; BImax, maximum BI at the block level for each neighborhood.
†Significantly different from corresponding values for control blocks (p<0.05).

Main Article

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