The term dysentery refers to a diarrheal stool that contains inflammatory exudate (pus) and blood. Bacillary dysentery refers to infectious diarrhea caused by invasive pathogens, most commonly, Shigella, Salmonella, Campylobacter, and enteroinvasive or enterohemorrhagic Escherichia coli.
Reference: Sleisenger MH, Fordtran JS (eds): Gastrointestinal Disease: Pathophysiology, Diagnosis, and Management, 7th ed. Philadelphia, W.B. Saunders, 2003