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Fecal BB75 load before and after infection. Real-time PCR quantification of fecal BB75 in all groups of mice (n = 9/group) after C. rodentium (CR) infection, and in BB pre-CR group two days after initiation of BB75 (i.e., five days before infection). Statistical significance was determined by Student’s t-test, data presented as mean ± SE. N.D, not detectable.
