MetronidazoleHelicobacter pyloriHelicobacter InfectionsDrug ResistanceDrug Resistance, MicrobialMicrobial Sensitivity TestsAnti-Bacterial AgentsDrug Resistance, BacterialDrug Resistance, NeoplasmMutationDrug Resistance, MultipleDrug Resistance, Multiple, BacterialMolecular Sequence DataPenicillin ResistanceCell LineApoptosisEscherichia coliAnti-Infective AgentsTumor Cells, CulturedBacterial ProteinsCell Line, TumorInsecticide ResistanceAntineoplastic AgentsDisease SusceptibilityPhenotypeImmunity, InnateStaphylococcus aureusBase SequenceErythromycinDrug Resistance, ViralDNA, BacterialAmino Acid SequenceCell SurvivalTime FactorsCiprofloxacinTetracyclineFluoroquinolonesStreptococcus pneumoniaeDisease ResistanceSpecies SpecificityPenicillinsMice, Inbred C57BLPlant Diseasesbeta-LactamasesAntitubercular AgentsKineticsDose-Response Relationship, Drug