FIG. 1.

Estimated generation times (means ± standard errors of the means) of E. coli BJ4 in feces from streptomycin-treated (closed circles) and the monoassociated (open circles) mice, as determined by hybridization of fixed fecal samples. Animals were orally inoculated with E. coli BJ4 on day 0. On day 6, they were conventionalized by oral inoculation of a homogenate containing cecal contents from a conventional mouse.