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Viability of E. coli O157:H7 (Wt or carbenicillin-adapted subpopulations) treated or not with irradiation at 0.4 kGy. Immediately after irradiation treatment, five μL of each cell culture were used. Results are represented by log10 of CFU/mL. Carb: carbenicillin adapted bacteria; Ctl: control non-irradiated; Irr: irradiated.
