Final answer:
Amoebic dysentery is caused by the protozoan parasite Entamoeba histolytica and is transmitted through contaminated water or food with fecal contamination. Symptoms can range from mild diarrhea to severe infection with abdominal distension, fever, and potential spread to other organs.
Step-by-step explanation:
Amoebic dysentery is caused by the protozoan parasite Entamoeba histolytica. The mode of transmission is through contaminated water or food that has fecal contamination. The basic symptoms of amoebic dysentery can range from mild diarrhea to severe infection, characterized by severe diarrhea with blood and mucus, abdominal distension, fever, and potential spread to other organs such as the liver.