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Electron microscopy images (magnification: left, 5 μm; right, 500 nm) of biofilm disruption of the polymyxin-resistant P. aeruginosa CF isolate FADDI-PA066 (A) untreated or treated with the respective 1× MIC: (B) colistin (128 mg/L); (C) octapeptin A3 (16 mg/L).
