Dysentery (formerly known as flux or the bloody flux)'s a disorder of the digestive system that results in severe diarrhea containing mucus and blood in the feces. If left untreated, dysentery can and usually will be fatal. Symptoms and complications Symptoms of dysentery include frequent passage of feces and, in some cases, vomiting of blood. The frequency of urges to defecate, the volume of feces passed, and the presence of mucus and/or blood depends on the parasite that's causing the disea… (More on Dysentery)