[helicobacter pylori in children in hospital nacional de niños, san josé de costa rica].infection with helicobacter pylori is more prevalent in developing than in developed countries. several publications from costa rica associate this agent with almost 70% of the adults suffering gastritis; however, there are not data about its prevalence in children. in order to address that gap in the epidemiology of helicobacter pylori in costa rica, we study 264 children (3 months to 17 years old) remitted to upper endoscopy due to dyspeptic disorders. from each case at least two biopsies were ...200314708466
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