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  • Title: Combating Carbapenem-Resistant Acinetobacter baumannii by an Optimized Imipenem-plus-Tobramycin Dosage Regimen: Prospective Validation via Hollow-Fiber Infection and Mathematical Modeling.
    Author: Landersdorfer CB, Yadav R, Rogers KE, Kim TH, Shin BS, Boyce JD, Nation RL, Bulitta JB.
    Journal: Antimicrob Agents Chemother; 2018 Apr; 62(4):. PubMed ID: 29339388.
    Abstract:
    We aimed to prospectively validate an optimized combination dosage regimen against a clinical carbapenem-resistant Acinetobacter baumannii (CRAB) isolate (imipenem MIC, 32 mg/liter; tobramycin MIC, 2 mg/liter). Imipenem at constant concentrations (7.6, 13.4, and 23.3 mg/liter, reflecting a range of clearances) was simulated in a 7-day hollow-fiber infection model (inoculum, ∼107.2 CFU/ml) with and without tobramycin (7 mg/kg q24h, 0.5-h infusions). While monotherapies achieved no killing or failed by 24 h, this rationally optimized combination achieved >5 log10 bacterial killing and suppressed resistance.
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