Fig 3.

Effect of antibiotics on ϕMMP02 and ϕMMP04 induction. Prophage induction was assessed after 8 h of growth in the presence of various sub-MICs of ciprofloxacin (CIP), moxifloxacin (MXF), or levofloxacin (LVX). Mitomycin C (MC) was used as a positive control of induction. (A and C) Induction from laboratory-generated lysogens. (B and D) Induction from wild-type lysogens. The differences in phage titers were analyzed by one-way ANOVA followed by Dunnett's posttest using the noninduced control (NI) as the comparator. One asterisk indicates significance with a P value of <0.05, two asterisks indicate significance with a P value of <0.01, and three asterisks indicate significance with a P value of <0.001.