Commoner ICU causes

• Infection — Clostridium difficile, gastroenteritis (e.g. Salmonella, Shigella), rarer tropical causes (e.g. cholera, dysentry, giardiasis, tropical sprue).

• Gastrointestinal — feed (e.g. lactose intolerance), coeliac disease, other malabsorption syndromes, inflammatory bowel disease, diverticulitis, pelvic abscess, bowel obstruction with overflow. Enteral feed is often implicated but rarely causative.

• For bloody diarrhoea consider infection, ischaemic or inflammatory bowel disease.

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