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. 2014 Dec;109(8):1030-40.
doi: 10.1590/0074-0276140234. Epub 2014 Dec 9.

Temporal abundance of Aedes aegypti in Manaus, Brazil, measured by two trap types for adult mosquitoes

Carolin Marlen Degener  1 , Tatiana Mingote Ferreira de Ázara  1 , Rosemary Aparecida Roque  2 , Cláudia Torres Codeço  3 , Aline Araújo Nobre  3 , Jörg Johannes Ohly  4 , Martin Geier  5 , Álvaro Eduardo Eiras  1
Affiliations

Temporal abundance of Aedes aegypti in Manaus, Brazil, measured by two trap types for adult mosquitoes

Carolin Marlen Degener et al. Mem Inst Oswaldo Cruz. 2014 Dec.

Abstract

A longitudinal study was conducted in Manaus, Brazil, to monitor changes of adult Aedes aegypti (L.) abundance. The objectives were to compare mosquito collections of two trap types, to characterise temporal changes of the mosquito population, to investigate the influence of meteorological variables on mosquito collections and to analyse the association between mosquito collections and dengue incidence. Mosquito monitoring was performed fortnightly using MosquiTRAPs (MQT) and BG-Sentinel (BGS) traps between December 2008-June 2010. The two traps revealed opposing temporal infestation patterns, with highest mosquito collections of MQTs during the dry season and highest collections of BGS during the rainy seasons. Several meteorological variables were significant predictors of mosquito collections in the BGS. The best predictor was the relative humidity, lagged two weeks (in a positive relationship). For MQT, only the number of rainy days in the previous week was significant (in a negative relationship). The correlation between monthly dengue incidence and mosquito abundance in BGS and MQT was moderately positive and negative, respectively. Catches of BGS traps reflected better the dynamic of dengue incidence. The findings help to understand the effects of meteorological variables on mosquito infestation indices of two different traps for adult dengue vectors in Manaus.

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Figures

Fig. 1
Fig. 1. : maps of the study area. A: Brazil with the localisation of Manaus, state of Amazonas, indicated by a black circle; B: the neighbourhood of Cidade Nova, in Manaus, indicated by a black circle; C: localisation of the six clusters, indicated by white rectangles.
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Fig. 2A: monthly precipitation (rain), monthly maximum mean temperature (Tmax), monthly minimum mean temperature (Tmin) and monthly mean relative humidity (humidity) in Manaus, state of Amazonas, Brazil, between December 2008-June 2010; B: monthly precipitation (grey bars), mean monthly catches of female Aedes aegypti in MosquiTRAP (MQT) (dashed line) and BG-Sentinel (BGS) (solid line) and dengue incidence per 10,000 (dotted line) in Manaus between December 2008-June 2010.
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Fig. 3A: weekly precipitation and mean fortnightly catches of female Aedes aegypti in MosquiTRAP (MQT) (dashed line) and BG-Sentinel (BGS) (solid line) in Manaus, state of Amazonas, Brazil, between December 2008-June 2010; B: fortnightly trap positivity for Ae. aegypti in MQT (dashed line) and BGS (solid line) in Manaus between December 2008-June 2010.
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