Recurrence of Helicobacter pylori Infection in Bolivian Children and Adults After a Population-Based Screen and Treat Strategy

BackgroundStrategies to prevent gastric cancer by decreasing Helicobacter pylori infections in high-prevalence, low-income countries could include a population-based screen and treat eradication program. MethodsWe tested residents of two rural villages for H.pylori infection using urea breath test (UBT), treated infected persons using directly observed therapy (DOT), retested for cure, and retested after 1year later for H.pylori infection. FindingsWe tested 1,065 (92%) of 1153 residents from two villages in rural Bolivia. Baseline H.pylori prevalence was 80% (95% confidence interval [CI]: 78-84). Age-specific cure rates were similar (92%) after DOT. Among those cured, 12% (95% CI: 8-15) had recurrent infection. Age-specific annual H.pylori recurrence rates for combined villages were 20% (95% CI: 10-29) in persons <5years, 20% (95% CI: 10-29) in 5-9years, 8% (95% CI: 1-15) in 10-14years, and 8% (95% CI: 4-12) in persons 15years. Compared with the referent population, those 15years, recurrent infections were significantly more likely in children <5years (odds ratios [OR] 2.7, 95% CI: 1.2-5.8) and 5-9years (OR 2.7, 95% CI: 1.4-5.1). InterpretationChildren <10years had high H.pylori recurrence rates following a population-based screen and treat program; this H.pylori eradication strategy may not be feasible in high-prevalence, low-income settings.