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1 July 2008 Comparison of Kato–Katz Direct Smear and Sodium Nitrate Flotation for Detection of Geohelminth Infections
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Abstract

Two hundred eighty-one stool samples were comparatively examined for the presence of ova of Ascaris lumbricoides, hookworms, and Trichuris trichiura using the traditional Kato–Katz technique and Ovassay® Plus (Synbiotics Corp., San Diego, California) with a sodium nitrate solution to test the hypothesis that use of a commercially available flotation kit would provide a faster, cleaner, and more effective means of detecting geohelminth infections in human helminthological surveys than the traditionally used Kato–Katz direct-smear technique. Fecal flotation was as effective as Kato–Katz in detection of ova of Ascaris lumbricoides; however, it was not as effective in detecting ova of Trichuris trichiura. There was no significant difference in the prevalence of hookworm infection revealed by the 2 techniques when Kato–Katz preparations were viewed within an hour of preparation; however, after 1 hr, the effectiveness of Kato–Katz in the detection of hookworm ova declined significantly.

Dennis J. Richardson, Jeanette Gross, and Michael C. Smith "Comparison of Kato–Katz Direct Smear and Sodium Nitrate Flotation for Detection of Geohelminth Infections," Comparative Parasitology 75(2), 339-341, (1 July 2008). https://doi.org/10.1654/4340.1
Published: 1 July 2008
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