THE EFFECTS OF URBAN GROWTH ON DENGUE

Objective: To analyze the spatial and temporal dynamics of dengue in Coronel Fabriciano, Minas Gerais State, Brazil, and to associate cases to the growth of urban areas and loss of natural areas in recent years. Methods: This is a descriptive, exploratory study, with a quantitative approach. Dengue...

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Published in:Revista brasileira em promoção da saúde = Brazilian journal in health promotion 2015-08, Vol.26 (4)
Main Authors: Horta, Marco Aurélio Pereira, Ferreira, Aldo Pacheco, de Oliveira, Robson Bruniera, Wermelinger, Eduardo Dias, Ker, Fabrício Thomáz de Oliveira, Ferreira, Ana Cristina Navarro, Catita, Cristina Maria Sousa
Format: Article
Language:English
Subjects:
Aedes
Dengue
Distribución Espacial de la Población
Distribuição Espacial da População
Public Health
Residence Characteristics
Salud Pública
Saúde Pública
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Summary:Objective: To analyze the spatial and temporal dynamics of dengue in Coronel Fabriciano, Minas Gerais State, Brazil, and to associate cases to the growth of urban areas and loss of natural areas in recent years. Methods: This is a descriptive, exploratory study, with a quantitative approach. Dengue cases of 2009 were obtained from the Health Municipal Secretariat, including the suspected and confirmed cases. Shape files were obtained, containing information about the municipal boundary, boundary of the urban area, census tracts, areas with buildings and natural areas. Based on the distribution of dengue cases, the Kernel estimator was used to measure data dispersion. Results: Dengue cases reported were georeferenced in GIS (Geographic Information System) environment. The landscape showed changes in the units of urban area and pasture, as an urban growth over the pasture matrix. No changes were observed in the areas of remaining forest and eucalyptus. There are cases spatially spread with a tendency to form clusters. Conclusion: Cases of dengue were observed spatially clustered in the northern region of the city, where new neighborhoods have emerged in recent years, following the population growth without proper structure of urbanization and urban planning. In addition, urban growth have reduced the margin of watercourses providing a bare soil, suitable for accumulation of trash and formation of breeding sites for mosquitoes. Efficient public policies and appropriate urban planning might reduce the impact of dengue in endemic regions. Objetivo: Analisar a dinâmica espacial e temporal da dengue em Coronel Fabriciano, Minas Gerais, Brasil, e associar os casos ao crescimento das áreas urbanas e à perda de áreas naturais nos últimos anos. Métodos: Trata-se de um estudo descritivo, exploratório, de abordagem quantitativa. Os casos de dengue relativos a 2009 foram obtidos na Secretaria Municipal, incluindo-se os suspeitos e os confirmados. Obtiveram-se shape files contendo informações sobre o limite municipal, limite da área urbana, setores censitários, áreas com construções e áreas naturais. Com base na distribuição dos casos, o estimador de Kernel foi utilizado para medir sua dispersão. Resultados: Casos de dengue notificados foram georreferenciados em ambiente SIG (Sistema de Informações Geográficas). A paisagem mostrou mudanças nas unidades de zona urbana e pastagem, assim como crescimento urbano sobre a matriz de pastagem. Não foram observadas alterações nas
ISSN:1806-1222