Liver function tests and Entamoeba histolytica (E.H.) antibody titres have been studied in a variety of tropical and liver diseases. Patients with hepatic amoebiasis had a raised E.H. antibody titre and tended to have a low pseudocholinesterase activity. In two cases of amoebic liver abscess, which were treated by aspiration and emetine, there was a remarkable drop in the E.H. antibody titre. I...