CephalosporinsAnti-Bacterial AgentsMicrobial Sensitivity TestsCephalosporin Resistancebeta-LactamasesCephaloridineCephalosporinaseCefotaximeCephalexinCefiximePenicillinsbeta-LactamsCeftriaxoneDrug Resistance, MicrobialCephalothinCefmenoximeEnterobacteriaceaebeta-Lactam ResistanceCeftazidimeBacteriaCefotiamCeftizoximeEnterobacterCephradineKlebsiella pneumoniaeDrug Resistance, BacterialCefazolinPenicillinasePenicillin ResistanceAztreonamEnterobacteriaceae InfectionsGram-Negative BacteriaCefoxitinCefamandoleDrug Resistance, Multiple, BacterialCephamycinsKlebsiellaEscherichia coliCarbapenemsCefaclorCefoperazoneAmpicillinCefmetazoleCefadroxilBacterial InfectionsMoxalactamPenicillin GEnterobacter cloacaeIsoelectric FocusingKlebsiella InfectionsCross InfectionCefotetanCefuroximeClavulanic AcidLactamsCephaloglycinStructure-Activity RelationshipImipenemNeisseria gonorrhoeaeGram-Positive BacteriaPenicillanic AcidGonorrheaCloxacillinGram-Negative Bacterial InfectionsCefatrizinePenicillin-Binding ProteinsEscherichia coli InfectionsBacterial ProteinsCefsulodinThienamycinsDNA, BacterialMonobactamsChemistryHydrolysisDrug ResistanceChemical PhenomenaCitrobacterDrug UtilizationPseudomonas aeruginosaAminoglycosidesPlasmidsProteusStreptococcus pneumoniaeFluoroquinolonesConjugation, GeneticClavulanic AcidsStaphylococcus aureusProteus mirabilisKineticsProteus vulgarisDrug Resistance, MultiplePiperacillinMolecular Sequence DataAnti-Infective AgentsCitrobacter freundiiElectrophoresis, Gel, Pulsed-FieldProvidenciaPenicillin VSalmonella paratyphi ASulbactam