Clinical findings vary considerably. The main findings are:

• Asymptomatic amoebiasis (healthy cyst passers)
• Chronic amoebiasis with diarrhoea, and sometimes mucus
• Acute amoebiasis with dysentery and fever

More rarely: amoebic granulomata (in the wall of the large intestine) – often misdiagnosed as carcinoma – and ulceration in the perianal region

• Extra-intestinal amoebiasis: dissemination in the bloodstream produces liver abscesses, and occasionally abscesses of the lung and brain.