 Exudative diarrhea occurs with the presence of blood and pus in the stool.This occurs with inflammatory bowel diseases, such as Crohn's disease or ulcerative colitis, and other severe infections such as "E. coli" or other forms of food poisoning.Inflammatory diarrhea occurs when there is damage to the mucosal lining or brush border, which leads to a passive loss of protein-rich fluids and a decreased ability to absorb these lost fluids.