A patient has intestinal ulcers and bloody diarrhoea after infection by Entamoeba histolytica. The best answer is:

Entamoeba histolytica causes amoebiasis or amoebic dysentery. The parasite invades the intestinal wall and may produce ulcers, abdominal pain, and blood or mucus in stool. This MCQ belongs to the Entamoeba histolytica topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.