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Abundance of bacteria within the distal colon of mice inoculated with PBS (CR−) or C. rodentium (CR+) and rectally administered PBS (BU0) or butyrate at a concentration of 140 mM (BU140). (A) Mucosa-associated. (B) Digesta. Vertical lines associated with histogram bars represent standard errors of the means (n = 4). #, P ≤ 0.100; *, P ≤ 0.050 (comparing butyrate treatment effects within CR− mice [BU0 to BU140] and CR+ mice [BU0 to BU140]).
