FIG 5.

Effect of cis-DA on maintenance of the persister state. P. aeruginosa (A) and E. coli (B) persister cells were exposed to cis-DA in saline or saline for a period of 20 h prior to exposure to saline or ciprofloxacin in saline for a further 24 h. Viability was determined throughout the experiment. The averages of data from 3 experiments are shown. Error bars indicate standard deviations (*, P < 0.001 [significantly different from persister cells treated with saline, as indicated by one-way ANOVA]).