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Evaluation of a linear spectral mixture model and vegetation indices (NDVI and EVI) in a study of schistosomiasis mansoni and Biomphalaria glabrata distribution in the state of Minas Gerais, Brazil
Guimarães, Ricardo JPS; Freitas, Corina C; Dutra, Luciano V; Scholte, Ronaldo GC; Amaral, Ronaldo S; Drummond, Sandra C; Shimabukuro, Yosio E; Oliveira, Guilherme C; Carvalho, Omar S.
Afiliación
  • Guimarães, Ricardo JPS; Fiocruz. Instituto de Pesquisas René Rachou. Belo Horizonte. BR
  • Freitas, Corina C; Instituto Nacional de Pesquisas Espaciais. BR
  • Dutra, Luciano V; Instituto Nacional de Pesquisas Espaciais. BR
  • Scholte, Ronaldo GC; Fiocruz. Instituto de Pesquisas René Rachou. Belo Horizonte. BR
  • Amaral, Ronaldo S; Ministério da Saúde. Secretaria de Vigilância em Saúde. Brasília. BR
  • Drummond, Sandra C; Secretaria de Estado de Saúde de Minas Gerais. Belo Horizonte. BR
  • Shimabukuro, Yosio E; Instituto Nacional de Pesquisas Espaciais. BR
  • Oliveira, Guilherme C; Fiocruz. Instituto de Pesquisas René Rachou. Belo Horizonte. BR
  • Carvalho, Omar S; Fiocruz. Instituto de Pesquisas René Rachou. Belo Horizonte. BR
Mem. Inst. Oswaldo Cruz ; 105(4): 512-518, July 2010. ilus, tab
Article en En | LILACS | ID: lil-554823
Biblioteca responsable: BR1.1
ABSTRACT
This paper analyses the associations between Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) on the prevalence of schistosomiasis and the presence of Biomphalaria glabrata in the state of Minas Gerais (MG), Brazil. Additionally, vegetation, soil and shade fraction images were created using a Linear Spectral Mixture Model (LSMM) from the blue, red and infrared channels of the Moderate Resolution Imaging Spectroradiometer spaceborne sensor and the relationship between these images and the prevalence of schistosomiasis and the presence of B. glabrata was analysed. First, we found a high correlation between the vegetation fraction image and EVI and second, a high correlation between soil fraction image and NDVI. The results also indicate that there was a positive correlation between prevalence and the vegetation fraction image (July 2002), a negative correlation between prevalence and the soil fraction image (July 2002) and a positive correlation between B. glabrata and the shade fraction image (July 2002). This paper demonstrates that the LSMM variables can be used as a substitute for the standard vegetation indices (EVI and NDVI) to determine and delimit risk areas for B. glabrata and schistosomiasis in MG, which can be used to improve the allocation of resources for disease control.
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Texto completo: 1 Colección: 01-internacional Base de datos: LILACS Asunto principal: Plantas / Biomphalaria / Esquistosomiasis mansoni / Sistemas de Información Geográfica / Vectores de Enfermedades Tipo de estudio: Prevalence_studies / Prognostic_studies / Risk_factors_studies Límite: Animals / Humans País/Región como asunto: America do sul / Brasil Idioma: En Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: MEDICINA TROPICAL / PARASITOLOGIA Año: 2010 Tipo del documento: Article / Project document País de afiliación: Brasil Pais de publicación: Brasil
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: LILACS Asunto principal: Plantas / Biomphalaria / Esquistosomiasis mansoni / Sistemas de Información Geográfica / Vectores de Enfermedades Tipo de estudio: Prevalence_studies / Prognostic_studies / Risk_factors_studies Límite: Animals / Humans País/Región como asunto: America do sul / Brasil Idioma: En Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: MEDICINA TROPICAL / PARASITOLOGIA Año: 2010 Tipo del documento: Article / Project document País de afiliación: Brasil Pais de publicación: Brasil