Comparison of the Teesdale glass sandwich and Kato-Katz techniques for the diagnosis of Schistosoma mansoni: a double-blind study.

In a double blind study, the Teesdale glass sandwich and Kato-Katz techniques were compared for the diagnosis of Schistosoma mansoni. From each of five stool specimens, six slide preparations were made by each method, and each slide was read independently by two readers. Examination of the differences in the number of eggs per slide by Analysis of Variance (ANOVA) showed no significant differences between methods, readers, or slides prepared from the same specimen at the 90% level of significance.