[Eradication of Helicobacter pylori in Japan].

Twenty five years has passed since the re-discovery of Helicobacter pylori. Many people have studied on this organism since that time. Some mechanisms about gastric mucosal inflammation have been clarified, and pathogenesis of peptic ulcer formation and gastric cancer have been solved. H. pylori infection is related to chronic gastritis, peptic ulcer, gastric carcinoma, and MALToma. In 1998, it was reported that gastric cancer occurred in H. pylori infected mongolian gerbils. In Japan, the prevalence of peptic ulcer and gastric cancer is very high. Therefore, the treatment for H. pylori infection is necessary to prevent occurrence of these diseases. To treat H. pylori infection, various regimen have been tried. Triple therapy with PPI and two antibiotics is recommended for cure of H. pylori infection in European and US guidelines. Some guidelines for management of H. pylori infection and regimen were shown in this part.