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Effects of 2,4-dione and fluoroquinolone incubation time on the survival of E. coli on agar plates. An E. coli strain deficient in efflux (strain KD1397) was applied to agar plates containing UING5-249 (open circles) and the 2,4-dione UING5-207 (filled circles) at concentrations of three times their MIC99s. The broken line indicates the limit of detection. Similar results were obtained in two replicate experiments.
