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Growth of E. coli O157:H7, wild type and subpopulations -adapted to (a) 25 μg/mL, (b) 15 μg/mL or (c) 7 μg/mL carbenicillin, then treated or not with irradiation at 0.4 kGy. 200 μL of each cell culture were used. Carb: carbenicillin adapted bacteria; Ctl: control non-irradiated; Irr: irradiated.
