A comparative evaluation of end-emic and non-endemic region of visceral leishmaniasis (Kala-azar) in India with ground survey and space technology
Mem. Inst. Oswaldo Cruz
;
106(5): 515-523, Aug. 2011. ilus, mapas, tab
Article
in English
| LILACS
| ID: lil-597709
ABSTRACT
In visceral leishmaniasis, phlebotomine vectors are targets for control measures. Understanding the ecosystem of the vectors is a prerequisite for creating these control measures. This study endeavours to delineate the suitable locations of Phlebotomus argentipes with relation to environmental characteristics between endemic and non-endemic districts in India. A cross-sectional survey was conducted on 25 villages in each district. Environmental data were obtained through remote sensing images and vector density was measured using a CDC light trap. Simple linear regression analysis was used to measure the association between climatic parameters and vector density. Using factor analysis, the relationship between land cover classes and P. argentipes density among the villages in both districts was investigated. The results of the regression analysis indicated that indoor temperature and relative humidity are the best predictors for P. argentipes distribution. Factor analysis confirmed breeding preferences for P. argentipes by landscape element. Minimum Normalised Difference Vegetation Index, marshy land and orchard/settlement produced high loading in an endemic region, whereas water bodies and dense forest were preferred in non-endemic sites. Soil properties between the two districts were studied and indicated that soil pH and moisture content is higher in endemic sites compared to non-endemic sites. The present study should be utilised to make critical decisions for vector surveillance and controlling Kala-azar disease vectors.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Phlebotomus
/
Ecosystem
/
Insect Vectors
Type of study:
Observational study
/
Prevalence study
/
Prognostic study
/
Risk factors
/
Screening study
Limits:
Animals
/
Humans
Country/Region as subject:
Asia
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2011
Type:
Article
Affiliation country:
India
Institution/Affiliation country:
Memorial Research Institute of Medical Sciences/IN
/
Regional Remote Sensing Service Centre/IN
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