Biotic factors and occurrence of Lutzomyia longipalpis in endemic area of visceral leishmaniasis, Mato Grosso do Sul, Brazil
Mem. Inst. Oswaldo Cruz
;
107(3): 396-401, May 2012. ilus, graf, mapas, tab
Article
in English
| LILACS
| ID: lil-624022
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 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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Psychodidae
/
Ecosystem
/
Insect Vectors
Type of study:
Etiology study
/
Risk factors
Limits:
Animals
/
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2012
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Instituto Oswaldo Cruz-Fiocruz/BR
/
Secretaria Municipal de Saúde de Campo Grande/BR
/
Universidade Federal de Mato Grosso do Sul/BR
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