Dientamoeba fragilis is a protozoan with an intestinal location and a cosmopolitan spread. Recent reports show its role in the appearance of intestinal syndromes (dientamebiasis). A clinical case of dientamebiasis is reported in a 7-year-old child suffering from cramp-like abdominal pain and diarrhoea with a protracted course and definitive resolution after a week’s treatment with paramomicin.