Time trend prevalence of helicobacter pylori infection and endoscopic findings in symptomatic children in Portugal: A retrospective study based on three time points in 2009, 2014, and 2019.

Background: Helicobacter pylori infection acquisition occurs mainly in childhood and may be a critical factor in developing long-term complications. In contrast to other developed countries, previous studies have reported a relatively high H. pylori infection prevalence in Portugal, both in children and adults.