الفهرس 
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Abstract
Background: Acute infectious gastroenteritis (bacterial, viral, and protozoal) has been shown to be one of the strongest risk factors for development of IBS, a condition known as post-infectious IBS (PI-IBS). Recently, the Rome Foundation Working group proposed diagnostic criteria for PI-IBS based on Rome IV criteria.
Aim and Objective: to prospectively investigate the occurrence of postinfectious irritable bowel syndrome (PI-IBS), diagnosed according to the Rome IV criteria, in children with acute diarrhea of different infectious etiology, and matched with control subjects of similar age and sex.
Subjects and methods: A case control study was conducted on 93 children with acute infectious gastroenteritis that were presented at the outpatient clinics, children hospital, Ain Shams University, during a period of 6 months then follow up for presence of post infectious IBS was assessed by applying symptoms of IBS according to Rome IV after 3 months and comparing the results with the age- and sex-matched controls.
Result: The patient group was studied for the relationship between IBS and causative agents causing PI-IBS in the study population, that no statistically significant relation between IBS presence and investigation done to the study population as the result of investigation was as follow: Negative, Rota virus, Campylobacter, Salmonella, Adeno virus and Giardia with p-value 0.744, 0.765, 0.149,0.401,0.415,0.146 respectively.
Conclusion: PI-IBS accounts for around 24,7% of all patients in the study sample, distention has the highest positive association with IBS. While, straining show positive association with IBS. The information gained from this will help to target this chronic complication of intestinal infections and will also have broader implications for understanding and treating IBS, one of the commonest GI diagnoses,