FIG 1.

Phylogenetic tree comprised of 200 representative OTU sequences from Lachnospiraceae clone libraries. The color range represents OTU host types (i.e., human only, animal only, or human/animal). The number of sequences found in each OTU is in parentheses. The family Defluviitaleaceae clade is in blue. The E. coli outgroup's clade is shown in gray with dashed lines. Bootstrap values larger than 0.7 are indicated by lavender-colored circles, and the values are directly proportional to the circle sizes.