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Standard Distance Ellipse (SDE): a Novel Ellipsoid Spatial Analysis (NESA) for disease control

December 1, 2009 - 05:05 -- Usa Lek-Uthai

The distribution patterns of malaria incidence, using GIS, the geographically map that contain X and Y coordinates for computerized files on digitized base maps and the mosaic imageries from aerial photographs of each household should be created. The use of Standard Distance Ellipse (SDE) to measure the dispersion of the prevalence around the mean centre of malaria cases and points. The environmental, epidemiological and entomological factors such as positive cases, breeding sites of vector, wind velocity, density rate of mosquito’s larva, dissolved oxygen (DO), water pH should be measured. For instance that control efforts should focus attention on high risk areas especially household with heaviest caseload which probably be more cost effective than employing malaria control methods in a conventional manner. This SDE analytical technique would be useful for public health administrators, in order to establish an operational SDE for epidemiological control. The ellipsoidal areas would be suitable for the intervention to the malaria control efforts.