[Helicobacter pylori in patho- and morphogenesis of chronic gastritis and peptic ulcer].

Review of the literature on the role of Helicobacter pylori (HP) in the patho- and morphogenesis of chronic gastritis (CG) type B, gastric ulcer (GU) and duodenal ulcer (DU) is presented. Various hypotheses of pathogenetic effect of HP, histologic and ultrastructural characteristics of changes in the gastric and duodenal mucosa in HP infection are presented. The majority of authors consider HP as a possible pathogenic factor in CG type B, GU and DU. However, there are works in which HP is regarded as a saprophyte or a secondary infection. This indicates a necessity of further studies.