[High percentage of clarithromycin and metronidazole resistance in Helicobacter pylori clinical isolates obtained from Spanish children].

Abstract

Resistance to clarithromycin (56.6%) was higher than to metronidazole (35.7%) in the H. pylori strains studied. Clarithromycin resistance was very high even in strains from paediatric patients not previously treated for H. pylori infection.