CeftriaxoneCefotaximeAnti-Bacterial AgentsCephalosporinsAdministration, OralMicrobial Sensitivity TestsMeningitis, PneumococcalCephalosporin ResistanceCefiximeInjections, IntravenousGonorrheaNeisseria gonorrhoeaeStreptococcus pneumoniaeDrug Administration Schedulebeta-LactamsPenicillin ResistanceExcitatory Amino Acid Transporter 2Injections, IntramuscularPenicillinsMeningitisHalf-LifeCefuroximeDrug Resistance, BacterialLactamsDose-Response Relationship, DrugTime FactorsCiprofloxacinRats, Sprague-DawleyMeningitis, HaemophilusUnited States Food and Drug AdministrationDrug Therapy, CombinationSerum Bactericidal TestDrug Resistance, MicrobialAdministration, IntravenousDrug Administration RoutesAmpicillinDisease Models, AnimalCefotiamCeftazidimeAnti-Infective Agentsbeta-LactamasesMeningitis, BacterialBacterial InfectionsNetilmicinAzithromycinRats, WistarRabbitsCeftizoximeTreatment OutcomeInfusions, IntravenousInjections, IntraperitonealSpectinomycinSulbactamInjections, SubcutaneousInfusions, ParenteralCalcium GluconateGram-Negative BacteriaAdministration, Intranasal