MoxalactamEnterobacteriaceaeCephamycinsEnterobacteriaceae InfectionsCephalosporinsbeta-LactamasesCefotaximeCefoperazoneMicrobial Sensitivity TestsAnti-Bacterial Agentsbeta-LactamsBacteriabeta-Lactam ResistanceCefoxitinEnterobacterDrug Resistance, MicrobialSerratiaProteusCarbapenemsBacteriological TechniquesCeftazidimeKlebsiellaGram-Negative BacteriaEscherichiaImipenemKlebsiella pneumoniaeBacterial InfectionsLactamsCefazolinThienamycinsAztreonamPseudomonas aeruginosaCitrobacterPiperacillinMeningitisSerratia marcescensEscherichia coliTobramycinCefamandoleCefotetanCefmenoximeBacterial ProteinsTicarcillinAminoglycosidesCephalosporinasePenicillinsDrug Resistance, BacterialDrug Resistance, Multiple, BacterialGentamicinsCulture MediaCephalothinSalmonellaAmikacinEnterobacter cloacaeKlebsiella InfectionsAmpicillinCeftriaxoneDNA, BacterialGram-Negative Bacterial InfectionsBacteroides fragilisVibrionaceaePuerperal InfectionCarbenicillinEvaluation Studies as TopicProteus mirabilisKlebsiella oxytocaProvidenciaShigellaClavulanic AcidsCephalosporin ResistanceBacteria, AnaerobicKluyveraSpecies SpecificityPseudomonadaceaeCitrobacter freundiiFecesPenicillanic AcidPenicillin ResistanceCross Infection