CefotaximeCephalosporinsMoxalactamMicrobial Sensitivity TestsCephalosporin ResistanceCephamycinsbeta-LactamasesAnti-Bacterial AgentsCefoperazoneCeftazidimebeta-LactamsCeftriaxoneCeftizoximeEnterobacteriaceaePenicillin ResistancePenicillinsDrug Resistance, MicrobialStreptococcus pneumoniaebeta-Lactam ResistanceCefmenoximeEnterobacteriaceae InfectionsCefoxitinAztreonamCephalosporinaseLactamsBacteriaImipenemPiperacillinKlebsiella pneumoniaeCefuroximeCefotiamThienamycinsPenicillin-Binding ProteinsEnterobacterClavulanic AcidDrug Resistance, BacterialMeningitisAmpicillinGram-Negative BacteriaAmpicillin ResistanceKlebsiella InfectionsAzlocillinEscherichia coliCiprofloxacinBacterial InfectionsMuramoylpentapeptide CarboxypeptidaseEmpiricismSerum Bactericidal TestPneumococcal InfectionsClavulanic AcidsTobramycinPenicillanic AcidHexosyltransferasesPeptidyl TransferasesKlebsiellaMeningitis, PneumococcalDrug Resistance, Multiple, BacterialIsoelectric FocusingFleroxacinAnti-Infective AgentsPenicillin GAmikacinGentamicinsMezlocillinProteus vulgaris