Study design and C. rodentium infection model (a) study design; (b) viable C. rodentium counts in infected mice feces were quantified every other day p.i., n = 9–13/group (day 2–10 p.i.), and n = 1–4/group (day 12–28 p.i.); (c) percentage of body weight change among groups after infection, n = 12/group; (d) percentage of organ weight per gram of body weight among Sham and infected groups on day 10 p.i., n = 8/group. Data are presented as mean ± SE. Statistical significance was determined by repeated-measures ANOVA for C. rodentium counts and weight change and one-way ANOVA for organ weight followed by Bonferroni’s post-hoc test. Different superscripts (a,b) indicate significance among groups, p < 0.05. (○) Sham, (●) CR, (●) BB-CR, (●) BB pre-CR.