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Table 1. Differential diagnostic considerations in irritable bowel syndrome Inflammatory bowel diseaseUlcerative colitisCrohn's diseaseMicroscopic colitis InfectionParasitic infection (especially Giardia lamblia)Bacterial overgrowth in the small intestine MalabsorptionCeliac spruePancreatic insufficiency Dietary factorsFoods containing caffeine, lactose, excessive fat, or alcoholGas-producing foods PANCREATIC INSUFFICIENCY DOESN'T SEEMS TO BE AVAILABLE IN CANADA,IS IT A VALUABLE TEST?SIBO TOO.

 

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The infos above was from Eric topic: http://www.postgradmed.com/issues/2002/11_02/morgan1.htm