CephalosporinsAnti-Bacterial AgentsCephaloridineCephapirinCephalothinCephalexinContraceptives, Oral, SyntheticCephalosporinaseCefamandoleMicrobial Sensitivity TestsMandelic AcidsThiadiazolesDesogestrelBacteriaDrug IncompatibilityCefazolinCefotaximeNorpregnenesContraceptives, Oral, Combinedbeta-LactamasesCephalosporin ResistanceUreterolithiasisBacterial InfectionsAcremoniumChemistryChemical PhenomenaDrug StabilitySulfidesContraceptives, OralGram-Negative BacteriaThromboembolismIntestinal AbsorptionDrug Resistance, BacterialCeftriaxoneStructure-Activity RelationshipAntibiotic ProphylaxisDrug Resistance, Multiple, BacterialCefmenoximeCeftizoximeHepatitis C AntibodiesPenicillinsDrug Resistance, MicrobialAromatase InhibitorsPenicillin AmidaseEnterobacteriaceaeCeftazidimeCefiximeCefuroximeCefaclorRisk FactorsHepatitis CTime FactorsGram-Positive BacteriaTreatment OutcomePenicillin-Binding ProteinsEnterobacterStreptomycesPedigreeCefonicidAmpicillinCephradinebeta-LactamsPenicillin GEscherichia coliAminoglycosidesPenicillin ResistanceProspective StudiesStaphylococcus aureusPrevalencePenicillinaseMuramoylpentapeptide CarboxypeptidaseCefotiamInfant, NewbornCohort StudiesPseudomonas aeruginosaRetrospective StudiesPeptidyl TransferasesBacterial ProteinsGentamicinsHexosyltransferasesDrug UtilizationCase-Control StudiesAntibiotics, AntineoplasticAcetylesteraseCefoxitinCefoperazoneEnterobacteriaceae InfectionsFermentationLactamsVancomycinbeta-Lactam ResistanceCulture MediaCiprofloxacinKlebsiellaCefsulodinCephamycinsCloxacillinAztreonamStaphylococcusPenicillanic Acid