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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

Fig. 3A: weekly precipitation and mean fortnightly catches of femaleAedes aegypti in MosquiTRAP (MQT) (dashed line) andBG-Sentinel (BGS) (solid line) in Manaus, state of Amazonas, Brazil, betweenDecember 2008-June 2010; B: fortnightly trap positivity for Ae.aegypti in MQT (dashed line) and BGS (solid line) in Manaus betweenDecember 2008-June 2010.
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f03: Fig. 3A: weekly precipitation and mean fortnightly catches of femaleAedes aegypti in MosquiTRAP (MQT) (dashed line) andBG-Sentinel (BGS) (solid line) in Manaus, state of Amazonas, Brazil, betweenDecember 2008-June 2010; B: fortnightly trap positivity for Ae.aegypti in MQT (dashed line) and BGS (solid line) in Manaus betweenDecember 2008-June 2010.

Mentions: Fortnightly pattern of mosquito infestation and trap positivity - Forboth trap types, the mean number of female Ae. aegypti collected ineach monitoring week was calculated (Fig. 3A). Asdemonstrated before for monthly mean data, mosquito catches varied throughout the studyperiod for both trap types, however showing different trends. Mosquito density in BGSmostly followed the pattern of rainfall, with low catch rates during the dry season.Catches were highest at the beginning and at the end of the first rainy season. Afterthe dry period (July-November), catches increased again, but levels as high as in thefirst rainy season were not reached.


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)

Fig. 3A: weekly precipitation and mean fortnightly catches of femaleAedes aegypti in MosquiTRAP (MQT) (dashed line) andBG-Sentinel (BGS) (solid line) in Manaus, state of Amazonas, Brazil, betweenDecember 2008-June 2010; B: fortnightly trap positivity for Ae.aegypti in MQT (dashed line) and BGS (solid line) in Manaus betweenDecember 2008-June 2010.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f03: Fig. 3A: weekly precipitation and mean fortnightly catches of femaleAedes aegypti in MosquiTRAP (MQT) (dashed line) andBG-Sentinel (BGS) (solid line) in Manaus, state of Amazonas, Brazil, betweenDecember 2008-June 2010; B: fortnightly trap positivity for Ae.aegypti in MQT (dashed line) and BGS (solid line) in Manaus betweenDecember 2008-June 2010.
Mentions: Fortnightly pattern of mosquito infestation and trap positivity - Forboth trap types, the mean number of female Ae. aegypti collected ineach monitoring week was calculated (Fig. 3A). Asdemonstrated before for monthly mean data, mosquito catches varied throughout the studyperiod for both trap types, however showing different trends. Mosquito density in BGSmostly followed the pattern of rainfall, with low catch rates during the dry season.Catches were highest at the beginning and at the end of the first rainy season. Afterthe dry period (July-November), catches increased again, but levels as high as in thefirst rainy season were not reached.

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