Invasive or cytotoxic-producing organisms trigger an inflammatory response in the bowel mucosa.
Increase permeability and/or decrease absorptive area
Usually febrile and often appear toxic
Frequent or small-volume stools that contain mucous and blood.
Dysentery: Shigella, Campylobacter, Salmonella and clostridium difficle.
S. dysenteriae : potent cytotoxin (Shiga toxin) that causes patchy destruction of the colonic epithelium.