The sensitivities to penicillins and to a penicillin and b-lactamase inhibitor combination agent were determined for Helicobacter pylori strains that were sensitive, moderately resistant, or highly resistant to amoxicillin. All strains were resistant to nafcillin and oxacillin. Moderately resistant strains showed an intermediate zone of inhibition to ticarcillin, mezlocillin, piperacillin, and amoxicillin-clavulanic acid. Highlevel resistance was associated with the smallest zone size for all penicillins tested.
Sensitivity of amoxicillin-resistant Helicobacter pylori to other penicillins / Dore, Maria Pina; P, ; Graham, Dy; Realdi, G; Sepulveda, Ar; Osato, M. S.. - In: ANTIMICROBIAL AGENTS AND CHEMOTHERAPY. - ISSN 0066-4804. - 43:7(1999), pp. 1803-1804.