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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 107, No. 3, 2012, pp. 396-401
Bioline Code: oc12056
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 107, No. 3, 2012, pp. 396-401

 en Biotic factors and occurrence of Lutzomyia longipalpis check for this species in other resources in endemic area of visceral leishmaniasis, Mato Grosso do Sul, Brazil
de Oliveira, Everton Falcão; e Silva, Elaine Araújo; Fernandes, Carlos Eurico dos Santos; Filho, Antonio Conceição Paranhos; Gamarra, Roberto Macedo; Ribeiro, Alisson André; Brazil, Reginaldo Peçanha & de Oliveira, Alessandra Gutierrez

Abstract

The relationships between environmental exposure to risk agents and health conditions have been studied with the aid of remote sensing imagery, a tool particularly useful in the study of vegetation cover. This study aims to evaluate the influence of environmental variables on the spatial distribution of the abundance of Lutzomyia longipalpis check for this species in other resources and the reported canine and human visceral leishmaniasis (VL) cases at an urban area of Campo Grande, state of Mato Grosso do Sul. The sandfly captures were performed in 13 residences that were selected by raffle considering four residences or collection station for buffer. These buffers were generated from the central house with about 50, 100 and 200 m from it in an endemic area of VL. The abundance of sandflies and human and canine cases were georreferenced using the GIS software PCI Geomatica. The normalized difference vegetation index (NDVI) and percentage of land covered by vegetation were the environmental variables extracted from a remote sensing IKONOS-2 image. The average NDVI was considered as the complexity of habitat and the standard deviation as the heterogeneity of habitat. One thousand three hundred sixty-seven specimens were collected during the catch. We found a significant positive linear correlation between the abundance of sandflies and the percentage of vegetation cover and average NDVI. However, there was no significant association between habitat heterogeneity and the abundance of these flies.

Keywords
Lutzomyia longipalpis - geotechnologies - vegetation cover - spatial analysis - leishmaniasis

 
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