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(Science: microbiology) An infection with the protozoan, entamoeba histolytica occurs worldwide in areas of poor sanitation.

Amoebae inhabit the large intestine, where they cause ulcers and inflammation which can mimic ulcerative colitis. Amoebae can rarely develop in the liver and present as a liver abscess.

symptoms include anorexia, nausea, vomiting and diarrhoea.

diagnosis is by stool testing.