title: Seroincidence of Helicobacter pylori infection in a cohort of rural Bolivian children: acquisition and analysis of possible risk factors.
abstract: High seroprevalence rates for Helicobacter pylori are reported in developing countries, yet few seroincidence studies exist that determine age of initial acquisition and risk factors for H. pylori seroconversion. Two H. pylori serosurveys were conducted in August 1996 and November 1997. Of 188 children aged 21 months to 6 years who were seronegative in the first survey, 44 (23%) had seroconverted at follow-up, yielding an 18% annual seroincidence. The largest increase in seroincidence occurred between children aged 2 years (10%) and children aged 3 years (32%). Use of a lidded, narrow-mouthed water vessel was protective against seroconversion (odds ratio [OR], 0.3; 95% confidence interval [CI], 0.1-0.8), and the presence of another H. pylori-seropositive sibling in the household was a risk factor for seroconversion (OR, 3.1; 95% CI, 1.3-8.7). Although not a randomized intervention trial, this study suggests that the use of a narrow-mouthed water vessel may prevent the transmission of H. pylori in households in developing countries.
authors.affiliation: Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. kglynn@cdc.gov
authors.forename: M Kathleen
authors.initials: MK
authors.lastname: Glynn
authors.forename: Cindy R
authors.initials: CR
authors.lastname: Friedman
authors.forename: Benjamin D
authors.initials: BD
authors.lastname: Gold
authors.forename: Bhawna
authors.initials: B
authors.lastname: Khanna
authors.forename: Lori
authors.initials: L
authors.lastname: Hutwagner
authors.forename: Naomi
authors.initials: N
authors.lastname: Iihoshi
authors.forename: Carmen
authors.initials: C
authors.lastname: Revollo
authors.forename: Robert
authors.initials: R
authors.lastname: Quick
mesh_terms: D001838:Bolivia / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D016481:Helicobacter Infections / Q000453:epidemiology* / Q000276:immunology; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D007223:Infant; D012307:Risk Factors; D016036:Seroepidemiologic Studies