Fig. 1: Selection for ermF by macrolide antibiotics.

a Azithromycin. b Clarithromycin. c Erythromycin. *Significant positive selection to 90% confidence in comparison to the no antibiotic control. **Significant positive selection to 95% confidence in comparison to the no antibiotic control. n = 5 replicates per concentration. One high outlier replicate has been removed from the clarithromycin experiment (day 7, 250 µg/L). Boxplots follow the Tukey’s representation.