Dysentry is an infective disease of the large bowels characterized by frequent passing of blood and mucus with stool along with several abdominal cramps. Various microbial and chemical causes can result into dysentery in humans. Among the microbial aetiology are included both protozoa and bacteria. Dysentery caused by protozoa is called amoebic dysentery and dysentry caused by bacteria is called bacillary dysentery. Both amoebic and bacillary dysentery resemble each other, but can be differentiated on aetiological, clinical and laboratory grounds. Followings are the differences between amoebic dysentery and bacillary dysentery : Differences in Pathology Differences in Clinical Features Differences in Macroscopic Features of Stool Differences in Microscopic Features of Stool Source