Revista da Sociedade Brasileira de Medicina Tropical (Mar 1984)
Avaliação da estabilidade na contagem de ovos de Schistosoma mansoni pelo método de Kato-Katz em uma zona endêmica da esquistossomose
Abstract
A estabilidade da contagem de ovos de Schistosoma mansoni pelo método de Kato-Katz foi avaliada em 144 pessoas residentes em uma área endêmica de Minas Gerais. Os resultados do primeiro exame foram comparados à média obtida em três exames de fezes realizados num período de 11 semanas. Os pacientes foram agrupados de acordo com a contagem de ovos obtida no primeiro exame de fezes: The stability of S. mansoni egg count, using Kato-Katz method, was evaluated in 144 persons living in an endemic area of Minas Gerais State. The results obtained with the first stool examination were compared to the mean obtained with three examinations performed within a period of eleven weeks. The patients were classified in three different groups according to the numberof eggsfound in the first stool examination: < 100, 100-499, 500-999 and ≥ 1000 eggs (classification A); < 100, 100-499 and ≥ 500 eggs (classification B); < 500, 500-999 and ≥ 1000 eggs (classification C). The proportion of patients that remained within the same class of number of eggs (73-81%) was statistically similar in classifications A, B and C. The Pearson correlation coeficient was high (r = 0,9038) and the geometric mean number of eggs with the fist examination was similar to the one obtained with the three stool examinations (575.7 ±5.4 and 556.6 + 4.4, respectively).
