• Konstantinos Z Vardakas, Georgios L Voulgaris, George Samonis, and Matthew E Falagas.
• Alfa Institute of Biomedical Sciences (AIBS), Athens, Greece; Department of Medicine, Henry Dunant Hospital Center, Athens, Greece.
• Int. J. Antimicrob. Agents. 2018 Jan 1; 51 (1): 1-9.

BackgroundInhaled colistin is becoming increasingly popular against respiratory tract infections caused by multidrug resistant (MDR) Gram-negative bacteria because it may overcome the problems associated with intravenous (IV) administration.ObjectiveTo investigate the effectiveness and safety of inhaled colistin as monotherapy (without concomitant IV administration of colistin) in the treatment of respiratory tract infections caused by MDR or colistin-only susceptible Gram-negative bacteria.MethodsPubMed and Scopus databases were searched. A systematic review and meta-analysis were conducted.ResultsTwelve studies (373 patients receiving inhaled colistin for respiratory tract infection) were included. Ten studies evaluated patients with pneumonia (including 8 studies with ventilator-associated pneumonia) and 2 studies evaluated patients with ventilator-associated tracheobronchitis. Patients with infections due to MDR Acinetobacter baumannii and Pseudomonas aeruginosa were mainly studied. Daily dose of inhaled colistin and treatment duration varied in the individual studies. The pooled all-cause mortality was 33.8% (95% CI 24.6% - 43.6%), clinical success was 70.4% (58.5% - 81.1%) and eradication of Gram-negative bacteria was shown in 71.3% (57.6% - 83.2%) of cases.ConclusionsInhaled colistin monotherapy may deserve further consideration as a mode for colistin administration for the treatment of respiratory tract infections caused by MDR A. baumannii and P. aeruginosa.Copyright © 2017 Elsevier B.V. and International Society of Chemotherapy. All rights reserved.

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