[Ulcer. New approach to the problem].

The paper deals with the issues of ulcerogenesis, including the value of Helicobacter pylori (HP) as one of the etiological and pathogenetic factors of ulcer diseases. The data available in the literature and the author's own findings have allowed the author to study the spread of HP infection. There is a higher incidence of ulcer disease among endoscopists than that in therapeutists and inhabitants in Moscow. Light and electron microscopies have demonstrated abnormal changes in the gastric mucosa if there is HP infection. The paper also analyzes the therapeutical efficiency of antiulcer drugs and their effects on the degree of gastric sanitation from HP.