The 7-day H. pylori eradication regimen with PAC was superior to PCM and PAM. This is probably due to the high resistance rate to metronidazole in the Mexican population. Thus, H. pylori eradication regimens that involve metronidazole cannot be recommended for Mexican patients. RESULTS from this study highlight the regional differences in efficacy of some well established H. pylori eradication regimens, and suggest that culture and susceptibility testing to define H. pylori resistance patterns in specific geographical areas may be indicated before recommending any particular eradication schedule.
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