Please use this identifier to cite or link to this item: http://www.arca.fiocruz.br/handle/icict/18077
Title: Aedes (Stegomyia) albopictus' dynamics influenced by spatiotemporal characteristics in a Brazilian dengue-endemic risk city.
Authors: Bezerra, Juliana Maria Trindade
Araújo, Raphaela Guedes Pereira
Melo, Fabrício F.
Gonçalves, Caroline Macedo
Chaves, Bárbara
Silva, Breno de Mello
Silva, Luciana D.
Brandão, Silvana T.
Secundino, Nágila Francinete Costa.
Norris, Douglas E.
Pimenta, Paulo Filemon Paolucci
Affilliation: Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Fundação de Medicina Tropical Dr. Heitor Vieira Dourado. Manaus, AM, Brazil
Federal Universidade de Ouro Preto. Departamento de Ciencias Biologicas. Ouro Preto, MG, Brazil
Universidade Federal de Minas Gerais. Faculdade de Medicina. Departamento de Medicina Interna. Belo Horizonte, MG, Brazil
Prefeitura de Belo Horizonte. Secretaria Municipal de Saude. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Johns Hopkins University. Johns Hopkins Malaria Research Institute. Bloomberg School of Public Health. Departament of Molecular Microbiology and Immunology. Maryland, MD, USA
Fundação Oswaldo Cruz. Centro de Pesquisa René Rachou. Laboratorio de Entomologia Médica. Belo Horizonte, MG, Brazil
Abstract: Brazil reported the majority of the dengue cases in Americas during the last two decades, where the occurrence of human dengue cases is exclusively attributed to the Aedes (Stegomyia) aegypti (Linnaeus). Nowadays, other recognized Dengue virus (DENV) vector in Asian countries, Aedes (Stegomyia) albopictus (Skuse), has been detected in more than half of the 5565 Brazilian municipalities. Therefore, the aim of the present study was to investigate the presence of, and determine the Ae. albopictus' dynamics influenced by spatiotemporal characteristics in a dengue-endemic risk city of Belo Horizonte, Minas Gerais State's capital. Aedes albopictus were collected across four consecutive DENV transmission seasons from 2010 to 2014. These mosquitoes were caught in three selected districts, which had been reported in the previous ten years as having high mosquito densities and an elevated concentration of human dengue cases during epidemic seasons. All field-caught Ae. albopictus was individually processed by real-time RT-PCR, to research the DENV presence. The third season (p<0.05) and the Pampulha district (p<0.05) had the highest proportions of field-caught Ae. albopictus, respectively. The second season had the highest proportion of DENV-infected field-caught females (p<0.05), but there was no difference among the proportions of DENV-infected Ae. albopictus when comparing the collection in the three districts (p=0.98). Minimum (p=0.004) and maximum (p<0.0001) temperature were correlated with the field-caught Ae. albopictus in four different periods and districts. In the generalized linear model of Poisson, the field-caught DENV-infected Ae. albopictus (p=0.005), East district (p=0.003), minimum temperature (p<0.0001) and relative humidity (p=0.001) remained associated with the total number of human dengue cases. Our study demonstrated that the number of field-caught DENV-infected Ae. albopictus was inversed correlated with the number of human dengue cases. Our study raises the possibility that the DENV circulating in mosquitoes Ae. albopictus is happening in non-epidemic periods, showing that this species may be keeping only the presence of the virus in nature. Further long-term studies are necessary to better understand the role of Ae. albopictus in DENV transmission and or its vectorial competence in Belo Horizonte and in other endemic cities in Brazil and in the New World countries.
Keywords: Dengue virus (DENV)
Epidemic
Field-caught Aedes albopictus
Infection rate
Population distribution
keywords: virus da Dengue
Issue Date: 2016
Publisher: Elsevier B.V.
Citation: BEZERRA, Juliana Maria Trindade et al. Aedes (Stegomyia) albopictus' dynamics influenced by spatiotemporal characteristics in a Brazilian dengue-endemic risk city. Acta Trop., v. 164, p. 431-437, 2016.
ISSN: 0001-706X
Copyright: open access
Appears in Collections:CPqRR - Artigos de Periódicos

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