[Clinical significance of H. pylori genotyping].

Clinical implications of H. pylori genotyping are analysed. H. pylori usually occurs during exacerbation of duodenal ulcer (91.7%) and lymphocytic gastritis (93.5%). CagA strains of H. pylori most frequently develop resistance to metronidazole (50.5%), furazolidone (15.1%), amxicillin (13.2%), and tetracycline (11.3%).