PenicillinsPenicillin ResistanceCephalosporinsNasopharyngeal DiseasesStreptococcus pneumoniaePenicillin GMicrobial Sensitivity TestsAnti-Bacterial AgentsPneumococcal InfectionsPenicillin VPenicillin-Binding ProteinsMuramoylpentapeptide CarboxypeptidasePeptidyl TransferasesHexosyltransferasesPenicillin G ProcainePenicillin AmidaseSerotypingbeta-LactamasesCephalosporin ResistancePenicillin G BenzathineCephaloridineCefotaximePenicillinaseCephalosporinasebeta-LactamsCephalexinCeftriaxoneDrug Resistance, MicrobialCefiximeCephalothinAmpicillinBacteriaEnterobacteriaceaeDrug Resistance, Bacterialbeta-Lactam ResistanceCefmenoximeCeftazidimeCeftizoximeNeisseria gonorrhoeaeEnterobacterCefazolinCefotiamCloxacillinCephradineAztreonamGonorrheaKlebsiella pneumoniaeEscherichia coliDrug Resistance, Multiple, BacterialCefoxitinGram-Negative BacteriaLactamsCefamandoleKlebsiellaEnterobacteriaceae InfectionsCefuroximePenicillanic AcidCephamycinsCarbapenemsBacterial ProteinsCefaclorBacterial InfectionsStreptococcal InfectionsProteusCefoperazoneDrug HypersensitivityClavulanic AcidCefadroxilMoxalactamErythromycinCefmetazoleIsoelectric FocusingCross InfectionImipenemAcremoniumStaphylococcus aureusStaphylococcusGram-Positive BacteriaDNA, BacterialKlebsiella InfectionsCarbenicillinStreptococcusCulture MediaGentamicinsAnti-Infective AgentsStructure-Activity RelationshipEnterobacter cloacaeMethicillinClavulanic AcidsFluoroquinolonesThienamycinsOxacillinAminoglycosidesGram-Negative Bacterial InfectionsCefotetanPiperacillinHydrolysisClindamycinKineticsPseudomonas aeruginosa