Single-cell imaging and characterization of <i>Escherichia coli</i> persister cells to ofloxacin in exponential cultures.

Such fluorescence peak in early recovery phase is highly significant ( P < 10 −3 ; 1.7-fold increase as compared to fluorescence at treatment time) and specific to persister cells, as shown by the absence of a significant increase at the population level and in the sensitive cells ( Fig. 3, A and B ).

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