Dysentery is an intestinal infection characterized by severe diarrhea, often accompanied by blood and mucus in the stool. It is typically caused by bacteria (such as Shigella or certain strains of E. coli) or parasites (like Entamoeba histolytica). The condition can lead to dehydration and requires prompt medical treatment, often with rehydration and antibiotics if bacterial in nature. Prevention focuses on good hygiene and access to clean water.