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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Caffeine effect on mortality and oviposition in successive generations of Aedes aegypti

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Author(s):
Alessandra Theodoro Laranja [1] ; Antonio José Manzato [2] ; Hermione Elly Melara de Campos Bicudo [3]
Total Authors: 3
Affiliation:
[1] Universidade Estadual Paulista. Instituto de Biociências, Letras e Ciências Exatas. Departamento de Biologia - Brasil
[2] Universidade Estadual Paulista. Instituto de Biociências, Letras e Ciências Exatas. Departamento de Ciências de Computação e Estatística - Brasil
[3] Universidade Estadual Paulista. Instituto de Biociências, Letras e Ciências Exatas. Departamento de Biologia - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Revista de Saúde Pública; v. 40, n. 6, p. 1112-1117, 2006-12-00.
Abstract

OBJECTIVE: Previous experiments showed that caffeine blocks the development of Aedes aegypti (Diptera, Culicidae) in the larval stage, consequently inhibiting the production of adults. This study aimed at obtaining data suggestive of caffeine resistance by these mosquitoes. METHODS: Experiments were carried out in successive generations to assess adult production from eggs laid in previous generation and oviposition rate in every generation using 200 and 500 µg/mL caffeine. Tap water was used as control. Experiments were conducted in the city of São José do Rio Preto, Southeastern Brazil between 2002 and 2005. Statistical tests consisted of exploratory data analysis and smoothing algorithms. RESULTS: Increasing reduction in productivity of adults occurred among generations at both caffeine concentrations but the differences were only significant at 200µg/mL caffeine. As for the oviposition rate, there was a decrease in the mean number of eggs per female over generations at both caffeine concentrations. CONCLUSIONS: There was no evidence of caffeine resistance over generations. The study results corroborate caffeine as an alternative as an important Ae. Aegypti control agent to avoid resistance. (AU)