ColistinAmikacinKanamycinAnti-Bacterial AgentsAcinetobacter baumanniiAcinetobacter InfectionsDrug Resistance, Multiple, BacterialMicrobial Sensitivity TestsTobramycinGentamicinsGram-Negative Bacterial InfectionsAminoglycosidesPseudomonas aeruginosaPseudomonas InfectionsNetilmicinCeftazidimeGram-Negative BacteriaKlebsiella pneumoniaePolymyxinsImipenemDrug Resistance, BacterialDrug Resistance, MicrobialAcinetobacterCapreomycinPolymyxin BMinocyclineEnterobacteriaceaeDrug Therapy, CombinationCentral Nervous System Bacterial InfectionsSisomicinCarbenicillinCarbapenemsDrug SynergismKlebsiella InfectionsThienamycinsDibekacinCross InfectionPneumonia, BacterialEnterobacteriaceae InfectionsAdministration, Inhalationbeta-LactamasesLabyrinthine FluidsAztreonamPiperacillin