H. pylori test and treat in case of unexplained ... by metronidazole if less than 40% resistance Bismuth-containing quadruple therapy (PPI, bismuth, tetracycline, metronidazole; 10–14 days ...

85% for those without), whereas in vitro metronidazole resistance did not have a similar effect on eradication rates for the quadruple-therapy group ... areas where H. pylori infection is endemic ...

The American Journal of Gastroenterology has published a new guideline on the treatment of Helicobacter pylori (H. pylori ...