Volume 31, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



To assess the mode of transmission of infection in rural Bangladesh, questionnaire and culture surveys were conducted in (neighborhoods) where persons with diarrhea associated with infection and index controls with non- diarrhea lived. Nineteen percent of persons in baris and 7% of persons in control baris were infected during the survey periods ( < 0.001). The prevalence of infection was highest for children 1–9 years of age and for females older than 39 years and was not related to socioeconomic status, family size or household crowding. Use of surface water for drinking was not a risk factor for infection; in fact, use of river water was more frequent in control baris. Both household and bari contacts of index cases frequently excreted different serotypes from that excreted by the person with the index case. In baris, families with infection were significantly more likely than uninfected families to have a history of an overnight stay away from home by a family member during the previous week. These observations suggest there were multiple introductions of into some families and that the epidemiology of infection for families in rural Bangladesh differs from that observed for families living in more industrialized countries.


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