title: Dyspepsia and irritable bowel syndrome after a Salmonella gastroenteritis outbreak: one-year follow-up cohort study.
abstract: OBJECTIVE
  It has been reported that some patients develop functional digestive disorders, particularly irritable bowel syndrome (IBS), after acute gastroenteritis (AGE). However, the presence of dyspepsia has not been specifically addressed. We prospectively evaluated development of dyspepsia and IBS during a 1-year follow-up in a cohort of adult patients affected by a Salmonella enteritidis AGE outbreak.
  
  
  METHODS
  Questionnaires were sent to 1878 potential participants at baseline and 3, 6, and 12 months; 677 had experienced a Salmonella enteritidis AGE on June 23, 2002, and 1201 had not (randomly selected controls, matched for village of residence, age, and sex). At 12 months, 271 patients and 335 controls returned the questionnaires. Data permitted the establishment of dyspepsia and IBS diagnosis by Rome II criteria.
  
  
  RESULTS
  Before the AGE outbreak, the prevalence of dyspepsia was similar in cases and controls (2.5% vs 3.8%); the prevalence of IBS was also similar (2.9% vs 2.3%). At 3, 6, and 12 months, the prevalence of both dyspepsia and IBS had increased significantly in exposed compared with unexposed subjects. Overlap between dyspepsia and IBS was frequent. At 1 year, the relative risk for development of dyspepsia was 5.2 (95% confidence interval, 2.7-9.8) and for IBS was 7.8 (95% confidence interval, 3.1-19.7). Prolonged abdominal pain and vomiting during AGE were positive predictors of dyspepsia. No predictive factors for IBS were found.
  
  
  CONCLUSIONS
  Salmonella gastroenteritis is a significant risk factor not only for IBS but also for dyspepsia; at 1 year of follow-up, 1 in 7 and 1 in 10 subjects developed dyspepsia or IBS, respectively.
authors: Institute of Functional and Motor Digestive Disorders, Centro Médico Teknon, Barcelona, Spain. mearin@dr.teknon.es
authors: Fermín
authors: F
authors: Mearin
authors: Marc
authors: M
authors: Pérez-Oliveras
authors: Antonia
authors: A
authors: Perelló
authors: Jaume
authors: J
authors: Vinyet
authors: Anabel
authors: A
authors: Ibañez
authors: Jordi
authors: J
authors: Coderch
authors: Mónica
authors: M
authors: Perona
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004196:Disease Outbreaks; D004415:Dyspepsia / Q000453:epidemiology / Q000382:microbiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D043183:Irritable Bowel Syndrome / Q000453:epidemiology / Q000382:microbiology*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors; D012480:Salmonella Infections / Q000150:complications* / Q000453:epidemiology; D012477:Salmonella enteritidis; D011795:Surveys and Questionnaires