Gastric microflora was studied in 28 patients suffering acute and chronic gastritis with reference to the factors of pathogenicity and sensitivity to antibacterial preparations. A total of 55 bacterial species were isolated The microflora was dominated by streptoccoci while Helicobacter pylori occurred rather rarely 27.3 +/- 6.5% of the isolated strains showed urease activity 36.3 +/- 6.5% natural or acquired virulence, 45.5 +/- 6.7% resistance to eradication therapy.
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