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Colonization by wild-type K. pneumoniae LM21 (■) and its capsule-defective mutant, K. pneumoniae LM21(cps) (▴), of the intestines of streptomycin-treated mice. The strains were fed separately to each of three streptomycin-treated mice. Symbols for day 0 represent the sizes of the inocula. At the indicated times, fecal samples were plated as described in the text. The detection limit is marked by a broken line. Bars represent standard errors of the means.
