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Influence of E. coli Nissle 1917 (Mutaflor) and rifaximin on mucosal blood flow in the colon in rats without or with acetic acid-induced colitis. Mean value ± SEM. N = 8 animals in each experimental group. a P < 0.05 compared to control saline-treated rats without induction of colitis; b P < 0.05 compared to colitis + NaCl; and c P < 0.05 compared to colitis + Mutaflor.
