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

Degener CM, Ázara TM, Roque RA, Codeço CT, Nobre AA, Ohly JJ, Geier M, Eiras ÁE - Mem. Inst. Oswaldo Cruz (2014)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Ecologia Química de Vetores, Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.

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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Related in: MedlinePlus

: maps of the study area. A: Brazil with the localisation of Manaus, stateof 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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f01: : maps of the study area. A: Brazil with the localisation of Manaus, stateof 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.

Mentions: Study area - The study was conducted in Cidade Nova (-3º2’39’’-59º57’54’’), a residential neighbourhood in the northern zone of Manaus (Fig. 1). Houses in Cidade Nova are mainly made ofwood and brick, most of them with verandas and/or backyards. Within the neighbourhood,which had an estimated population of about 121,135 (IBGE2011), six clusters, defined as areas of 104-151 households, were chosen.Clusters had a minimum distance of 250 m between each other.


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

Degener CM, Ázara TM, Roque RA, Codeço CT, Nobre AA, Ohly JJ, Geier M, Eiras ÁE - Mem. Inst. Oswaldo Cruz (2014)

: maps of the study area. A: Brazil with the localisation of Manaus, stateof 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.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4325619&req=5

f01: : maps of the study area. A: Brazil with the localisation of Manaus, stateof 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.
Mentions: Study area - The study was conducted in Cidade Nova (-3º2’39’’-59º57’54’’), a residential neighbourhood in the northern zone of Manaus (Fig. 1). Houses in Cidade Nova are mainly made ofwood and brick, most of them with verandas and/or backyards. Within the neighbourhood,which had an estimated population of about 121,135 (IBGE2011), six clusters, defined as areas of 104-151 households, were chosen.Clusters had a minimum distance of 250 m between each other.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Laboratório de Ecologia Química de Vetores, Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.

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.

Show MeSH
Related in: MedlinePlus