A term given to a number of disorders marked by inflammation of the intestines (especially of the colon) and also by pain in the abdomen, problems defecating, and frequent stools containing blood and mucus. May be caused by chemical irritants, bacteria, protozoa, or parasitic worms. Dysentery was one of the most severe problems of armies in the nineteenth century. Also called: flux, bloody flux, contagious pyrexia (fever), frequent griping stools.