PolymyxinsPolymyxin BColistinAdministration, OralAnti-Bacterial AgentsHemoperfusionLipid ALipopolysaccharidesInjections, IntravenousPseudomonas aeruginosaDrug Administration ScheduleMicrobial Sensitivity TestsDose-Response Relationship, DrugUnited States Food and Drug AdministrationTime FactorsGram-Negative BacteriaDrug Resistance, BacterialDrug Administration RoutesGram-Negative Bacterial InfectionsRats, Sprague-DawleyDrug Resistance, MicrobialEndotoxinsBurkholderia cenocepaciaAcinetobacter baumanniiDrug Resistance, Multiple, BacterialAdministration, IntranasalDisease Models, AnimalRats, WistarDrug SynergismAdministration, IntravenousInjections, IntraperitonealInjections, SubcutaneousAchromobacter denitrificansAntimicrobial Cationic PeptidesKidney Cortex NecrosisBacterial ProteinsUranyl NitrateNeomycinMice, Inbred C57BLLiverEscherichia coliPaenibacillusSalmonella typhimuriumAdministration, RectalBiological Availability