CephalosporinsCephalosporin ResistanceAnti-Bacterial AgentsMicrobial Sensitivity Testsbeta-LactamasesCeftazidimeCephalosporinasebeta-LactamsCefotaximeEnterobacter cloacaeCeftriaxoneCephaloridineEnterobacteriaceae Infectionsbeta-Lactam ResistancePenicillanic AcidCephalexinKlebsiella pneumoniaeEnterobacteriaceaeGram-Negative BacteriaPenicillinsThienamycinsPiperacillinCefiximeCeftizoximeEnterobacterAztreonamDrug Resistance, MicrobialImipenemAmikacinCephalothinCefmenoximeBacteriaGram-Negative Bacterial InfectionsPseudomonas aeruginosaCarbapenemsDrug Resistance, BacterialKlebsiella InfectionsCefotiamBacterial InfectionsCephradineDrug Resistance, Multiple, BacterialCefoperazoneCefazolinPenicillin ResistancePenicillinaseKlebsiellaEscherichia coliCross InfectionCefoxitinCefamandoleMonobactamsIsoelectric FocusingClavulanic AcidCephamycinsGram-Positive BacteriaEnterobacter aerogenesPseudomonas InfectionsCefaclorCefmetazoleBacteremiaCefadroxilEscherichia coli InfectionsMoxalactamAmpicillinBacterial ProteinsAcinetobacter baumanniiCefotetanPenicillin GCephaloglycinCefuroximeDrug UtilizationHalf-LifeDrug Therapy, CombinationCefatrizinePneumonia, BacterialLactamsFluoroquinolonesAminoglycosidesCloxacillinGonorrheaStructure-Activity RelationshipNeisseria gonorrhoeaeHydrolysisSkin Diseases, BacterialHospitalsElectrophoresis, Gel, Pulsed-FieldCefsulodinEmpiricismCilastatinFeverDNA, BacterialNeurotransmitter Transport ProteinsDrug StabilityPenicillin-Binding ProteinsAnti-Infective AgentsStaphylococcus aureusChemistryPlasmidsChemical PhenomenaCitrobacter