Helicobacter pylori(H. pylori) is a causative agent for chronic gastritis and is an important risk factor for peptic ulcers, gastric carcinomas, and gastric MALT lymphomas. In 2000, the Japanese Society for Helicobacter Research published a guideline on the diagnosis and treatment of H. pylori infection for physicians in routine medical practice. In this guideline, H. pylori eradication therapy is recommended in gastric or duodenal ulcer patients. H. pylori eradication is also recommended in gastric MALT lymphoma patients but the guideline says it should be done at specialist institutions. Considering the high prevalence of gastric carcinomas in Japan. H. pylori eradication for the prevention of gastric carcinomas should be discussed urgently.
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