Journal
DIGESTIVE AND LIVER DISEASE
Volume 41, Issue 12, Pages 844-849Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.dld.2009.07.007
Keywords
Irritable; Infection; Inflammation; Cytokines; Mast; Enterochromafin
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Gastrointestinal infection is ubiquitous worldwide though the pattern of infection varies widely. Poor hygiene and lack of piped water is associated with a high incidence of childhood infection, both viral and bacterial. However in developed countries bacterial infection is commoner in young adults. Studies of bacterial infections in developed countries suggest 75% of adults fully recover, however around 25% have long lasting changes in bowel habit and a smaller number develop the irritable bowel syndrome (IBS). Whether the incidence is similar in developing countries is unknown. Post-infective IBS (PI-IBS) shares many features with unselected IBS but by having a defined onset allows better definition of risk factors. These are in order of importance: severity of initial illness, smoking, female gender and adverse psychological factors. Symptoms may last many years for reasons which are unclear. They are likely to include genetic factors controlling the immune response, alterations in serotonin signaling, low grade mucosal inflammation maintained by psychological stressors and alterations in gut microbiota. As yet there are no proven specific treatments, though 5HT(3) receptor antagonists, anti-inflammatory agents and probiotics are all logical treatments which should be examined in large well-designed randomised placebo controlled trials. Crown Copyright (C) 2009 Published by Elsevier Ltd on behalf of Editrice Gastroenterologica Italiana S.r.l. All rights reserved.
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