John Marshall

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BACKGROUND Individual studies suggest that post-infectious irritable bowel syndrome is common, but symptoms gradually improve. AIM To review evidence for an association between intestinal infection and development of irritable bowel syndrome, assess the prognosis of post-infectious irritable bowel syndrome and explore factors that increase the risk. (More)
BACKGROUND The management of patients with acute nonvariceal upper gastrointestinal bleeding has evolved substantially over the past 10 years amid a paucity of published consensus guidelines. PURPOSE To provide evidence-based management recommendations that address clinically relevant issues. REVIEW AND CONSENSUS PROCESSES: A multidisciplinary consensus(More)
BACKGROUND & AIMS Ulcerative colitis (UC) is difficult to treat, and standard therapy does not always induce remission. Fecal microbiota transplantation (FMT) is an alternative approach that induced remission in small series of patients with active UC. We investigated its safety and efficacy in a placebo-controlled randomized trial. METHODS We performed a(More)
BACKGROUND Post-infectious irritable bowel syndrome is a common clinical phenomenon of uncertain aetiology. AIM To test the association between intestinal permeability and irritable bowel syndrome symptoms 2 years after a large waterborne outbreak of bacterial gastroenteritis. METHODS Consecutive adults with Rome I irritable bowel syndrome and controls(More)
BACKGROUND Abdominal pain after colonoscopy is a common, distressing symptom resulting from bowel distension by insufflated gas. CO(2), unlike air, is rapidly cleared from the colon by passive absorption. A commercially available CO(2) delivery system has only recently become available. The effects of CO(2) and air insufflation on residual bowel gas and(More)
OBJECTIVE Colorectal cancer (CRC) screening uptake remains poor. Until we understand patient motivation and preferences for undertaking screening, it is unlikely the uptake will be optimal. Our objective is to examine patient preferences for CRC screening modalities and uptake rates using utility-based methods. METHODS The preference survey was mailed to(More)
CONTEXT Proton pump inhibitors (PPIs) and H(2) receptor antagonists (H(2)RAs) have become the mainstay of therapy in acid-related upper gastrointestinal disorders. There have been concerns raised about the possible association of PPIs with enteric infections. OBJECTIVE We conducted a systematic review to evaluate any association between acid suppression(More)
A randomized controlled trial (RCT) investigated patients with gastroesophageal reflux disease (GERD) who were stable and symptomatically controlled with long-term medical therapy to compare ongoing optimized medical therapy with laparoscopic Nissen fundoplication (LNF). Of the 180 patients eligible for randomization, 104 gave informed consent, and 3(More)
BACKGROUND Although postinfectious irritable bowel syndrome (PI-IBS) is a well-recognised complication of acute gastroenteritis, its prognosis remains poorly defined. The natural history of PI-IBS was assessed among participants in the Walkerton Health Study (WHS), which has followed the long-term effects of a large outbreak of acute gastroenteritis related(More)
BACKGROUND & AIMS A large outbreak of acute gastroenteritis at the annual meeting of the Canadian Society of Gastroenterology Nurses and Associates (CSGNA) was attributed to food-borne norovirus. A prospective study was undertaken to determine the incidence and natural history of postinfectious irritable bowel syndrome (PI-IBS). METHODS Questionnaires(More)