| antiamoebic chemoprophylaxis using quinfamide in children: a comparative study. | this study sought to examine whether the administration of quinfamide at 3- or 6-month intervals diminished the frequency of entamoeba histolytica cysts in stool samples compared to controls. the prospective, longitudinal, randomized, single-blind study examined children from six primary schools in celaya and neutla, guanajuato. of the 1,524 students in these schools, we selected participants for the study as follows: children were included in the study if their parents agreed in writing to the ... | 2002 | 12805964 |