Three hundred stool examinations were performed in order to compare the results of thefollowing techniques: Kato-Katz, Stoll-Hausheer and McMaster. For helminthic disease the number of positive samples with the Kato-Katz, Stoll-Hausheer and McMaster techniques were as follows: hoowkorm disease -117 (89,7%, 76% and 80.3%), infection due to Trichocephalus trichiurus - 124 (91.1%, 70.9% and 70.9%); Ascaris lumbricoides - 59 (94.9%, 84.7% and 49.1%); Schistosoma mansoni- 58 (96.5%, 48.2% and0%); Hymenolepis nana-15 (46.6%, 73.3% and 86.6%). On statistical analysis the Kato-Katz technique was the most sensitive for faecal egg counts. The Kato-Katz technique is also considered as the most specific and the easiest to perfbrm. The McMaster technique should not be used as a routineprocedure, because ofits low efficacy in revealing heavy eggs and due to the fact that the samples obtained with this method are difficult to examine.
Quantitative stool examinations; Comparative trial; Kato-Katz, Stoll-Hausheer and McMaster technique