CephalosporinsCephalosporin Resistancebeta-LactamasesAnti-Bacterial AgentsMicrobial Sensitivity TestsCephaloridineCephalosporinaseCefotaximeCephalexinCefiximebeta-LactamsPenicillinsCeftriaxoneCephalothinCefmenoximebeta-Lactam ResistanceEnterobacteriaceaeCeftazidimeCefotiamBacteriaCeftizoximeCephradineEnterobacterCefazolinKlebsiella pneumoniaeDrug Resistance, MicrobialPenicillinaseAztreonamEnterobacteriaceae InfectionsGram-Negative BacteriaCefoxitinCefamandolePenicillin ResistanceCephamycinsDrug Resistance, BacterialKlebsiellaCefaclorCarbapenemsCefoperazoneEscherichia coliCefmetazoleCefadroxilKlebsiella InfectionsDrug Resistance, Multiple, BacterialIsoelectric FocusingAmpicillinMoxalactamEnterobacter cloacaeBacterial InfectionsPenicillin GHistocompatibility Antigens Class ICefotetanStructure-Activity RelationshipClavulanic AcidCefuroximeCephaloglycinCross InfectionHistocompatibility Antigens Class IILactamsCefatrizinePenicillanic AcidCloxacillinGonorrheaImipenemNeisseria gonorrhoeaeGram-Positive BacteriaMolecular Sequence DataGram-Negative Bacterial InfectionsCefsulodinPenicillin-Binding ProteinsEscherichia coli InfectionsMonobactamsDrug UtilizationChemistryHydrolysisChemical PhenomenaCitrobacterThienamycinsBacterial ProteinsPlasmidsDNA, BacterialProteusProteus mirabilisProteus vulgarisKineticsClavulanic AcidsCitrobacter freundiiPseudomonas aeruginosaAminoglycosidesConjugation, GeneticPiperacillinAmino Acid SequenceProvidenciaPenicillin VSalmonella paratyphi AStreptococcus pneumoniaeDrug StabilityFluoroquinolonesSulbactamElectrophoresis, Gel, Pulsed-Field