Dyssentry is an infection of the intestines that causes bloody diarrhea and can be caused by parasites or bacteria. Symptoms include diarrhea with cramps, fever, nausea, vomiting, and blood or mucus in the diarrhea. Treatment involves over-the-counter medications to ease symptoms and manage pain, while prevention focuses on drinking bottled or canned water and eating only peeled raw fruits and vegetables. Complications can include low potassium levels, seizures, and kidney damage.