| post-infectious irritable bowel syndrome following water contamination. | post-infectious irritable bowel syndrome (pi-ibs) is a common disorder wherein symptoms of ibs begin after an episode of acute gastroenteritis. the walkerton health study (whs) was initiated in 2002 to study the long-term outcomes of tragic contamination of its municipal water supply with escherichia coli and campylobacter species in 2000. within a cohort of 2069 adult walkerton residents with no prior history of chronic gastrointestinal disorders, the incidence of pi-ibs 2 years after the outbr ... | 2009 | 19180133 |