Comparison of different Kato templates for quantitative faecal egg count of intestinal helminth parasites

Abstract

Introduction
Estimating the intensity of infection is crucial for. estimating morbidity due to intestinal helminth parasites (1) .The intensity of infection of most intestinal helminth parasites is indirectly estimated by quantitative faecal egg count which, in turn, is used for estimating the worm burden (2). Along this line, the quantitative Kato's thick smear method is the most widely used because of its simplicity , low cost, adaptability to the field and adequate sensitivity (3). However , because of the various modifications that are available (50mg, 41.7mg and 20mg templates) comparison of results have been quite difficult. The modifications are based on variations in the thickness and diameter of the template which, in turn, determines the amount of the faecal matter delivered on the slide.