[Influence of specific treatment of intestinal parasites and schistosomiasis on prevalence in students in Barra de Santo Antônio, AL].

From a total of 1,020 students examined, 983 (92%) showed positive results for at least one species of parasite. Six months after treatment, a sample of 383 students (37.5%) was reevaluated and 347 (90.6%) presented positive results. There was no significant change in prevalence before and after treatment, although the number of individuals that had multiple parasitism was significantly lower in the second sample.