dysentery /dis″inter′ē/ [Gk, dys + enteron, intestine] , an inflammation of the intestine, especially of the colon. The most common causes are bacterial (Shigella infection) and amebic (Entamoeba histolytica infection), although it can also be caused by chemical irritants. It is characterized by frequent and bloody stools, abdominal pain, and tenesmus. Dysentery is common in underdeveloped areas of the world and in times of disaster and social disorganization when sanitary living conditions, clean food, and safe water are not available. Treatment involves rehydration therapy. See also amebic dysentery, shigellosis.