FIG. 7.

Phylogenetic tree of partial 16S rRNA sequences based on E. coli positions 968 to 1376 retrieved from total sorted viable (L), injured (I), and dead (D) fractions from fecal samples from adult A and adult C and full-length reference sequences. The alignment and phylogenetic analysis were performed with the ARB software (29), and the tree was constructed using the neighbor-joining method (41) based on alignment positions conserved in at least 50% of the sequences analyzed. Bar = 10% diversity.