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Susceptibility of H. pylori strains to four antimicrobial agents. The MICs were determined by broth microdilution assays, as described in Materials and Methods. The strains, in strain 26695 (A) and strain HP159 (B) backgrounds, are indicated; 266959+Dioc and HP159+Dioc denote that 50 μM dioctylamine was added to the BHI broth containing FCS for MIC assays.
