Helicobacter pylori (H.pylori), which infects about 50% of the global population, has been recognized as a main risk factor of multiple gastric pathology, especially non-cardiac gastric cancer. Strong evidence supports that H.pylori eradication is an effective approach to reduce the incidence of those pathological processes. Antimicrobial susceptibility test can pick out sensitive drugs to kill Helicobacter pylori, and reduce secondary drug resistance. But, there is a lack of high quality RCT to compare its efficacy with empirical regimen in the rescue treatment.~This study aims to assess the efficacy of 14-day antimicrobial susceptibility test guided quadruple therapy for the rescue treatment of Helicobacter pylori infection. Comparing this regimen with 14-day personal Medication History guided therapy to tell which one is better in clinic practice. Alterations in H.pylori assosicated dyspepsia and safety outcomes will also be evaluated.
The purpose of this study is to assess efficacy of 14-day antimicrobial susceptibility test guided quadruple therapy for the rescue treatment of Helicobacter pylori infection, then comparing it with 14-day personal medication history guided therapy to tell which one has a better performance in both efficacy and safety.