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

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

Mass trapping with MosquiTRAPs does not reduce Aedes aegypti abundance

To all inhabitants of Cidade Nova who participated in the study, to Luzia Mustáfa, Ricardo Passos, Wanderson Sampaio and all field workers from the Foundation of Health Vigilance, to the Virology Department of the FMT-HVD, under supervision of Maria Paula Gomes Mourão, for the collection of blood samples, and to the Entomology Department of the FMTHVD, under supervision of Maria das Graças Vale Barbosa and Nelson Ferreira Fé, for assistance in processing the catch bags that returned from the field.Submitted by Ana Lucia Teixeira ([email protected]) on 2019-09-12T13:24:39Z No. of bitstreams: 1 Mass trapping with MosquiTRAPs does not reduce.pdf: 1235250 bytes, checksum: 4ba83deeb150ad49e31bdfc651e08970 (MD5)Approved for entry into archive by Ana Lucia Teixeira ([email protected]) on 2019-09-12T17:14:39Z (GMT) No. of bitstreams: 1 Mass trapping with MosquiTRAPs does not reduce.pdf: 1235250 bytes, checksum: 4ba83deeb150ad49e31bdfc651e08970 (MD5)Made available in DSpace on 2019-09-12T17:14:39Z (GMT). No. of bitstreams: 1 Mass trapping with MosquiTRAPs does not reduce.pdf: 1235250 bytes, checksum: 4ba83deeb150ad49e31bdfc651e08970 (MD5) Previous issue date: 2015-06The World Bank, UEA, CAPES, CNPq [PRONEXDengue (550131/2008-8)], INCT-DengueUniversidade Federal de Minas Gerais. Departamento de Parasitologia. Laboratório de Ecologia Química de Vetores. Belo Horizonte, MG, Brasil / Fundação Oswaldo Cruz. Presidência. Programa de Computação Científica. Rio de Janeiro, RJ, Brasil.Universidade Federal de Minas Gerais. Departamento de Parasitologia. Laboratório de Ecologia Química de Vetores. Belo Horizonte, MG, Brasil / Governo do Estado de Minas Gerais. Secretaria de Estado de Saúde de Minas Gerais. Belo Horizonte, MG, Brasil.Universidade Nilton Lins. Laboratório de Entomologia Aplicada. Manaus, AM, Brasil.Abteilung Wissenschaft und Diagnostik, Forel Klinik, Ellikon an der Thur, Switzerland.Universidade Federal de Minas Gerais. Laboratório de Vírus. Belo Horizonte, MG, Brasil.Universidade Federal de Minas Gerais. Laboratório de Vírus. Belo Horizonte, MG, Brasil.Universidade Federal de Minas Gerais. Laboratório de Vírus. Belo Horizonte, MG, Brasil.Fundação Oswaldo Cruz. Presidência. Programa de Computação Científica. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Presidência. Programa de Computação Científica. Rio de Janeiro, RJ, Brasil.Universidade do Estado do Amazonas. Centro de Estudos Superiores do Trópico Úmido. Manaus, AM, Brasil.Biogents AG, Regensburg, Germany.The objective of this study was to evaluate the effectiveness of Aedes aegypti mass trapping using the sticky trap MosquiTRAP (MQT) by performing a cluster randomised controlled trial in Manaus, state of Amazonas, Brazil. After an initial questionnaire and baseline monitoring of adult Ae. aegypti abundance with BG-Sentinel (BGS) traps in six clusters, three clusters were randomly assigned to the intervention arm where each participating household received three MQTs for mass trapping during 17 months. The remaining three clusters (control arm) did not receive traps. The effect of mass trapping on adult Ae. aegypti abundance was monitored fortnightly with BGS traps. During the last two months of the study, a serological survey was conducted. After the study, a second questionnaire was applied in the intervention arm. Entomological monitoring indicated that MQT mass trapping did not reduce adult Ae. aegypti abundance. The serological survey indicated that recent dengue infections were equally frequent in the intervention and the control arm. Most participants responded positively to questions concerning user satisfaction. According to the results, there is no evidence that mass trapping with MQTs can be used as a part of dengue control programs. The use of this sticky trap is only recommendable for dengue vector monitoring