Comparison of stool microbiota of mice (n = 3 per group at each time point) by 16S deep-sequencing analysis before, during, and after treatment with oral vancomycin for 10 days, vancomycin taper and pulsed regimen for 42 days, fidaxomicin for 10 days, or sterile water (control). The relative abundances of the major bacterial phyla are shown at each time point.