FIG. 10.

Site specificity of predominant bacterial species in the oral cavity. In general, bacterial species or phylotypes were selected on the basis of their detection in multiple subjects for a given site. Distributions of bacterial species in oral sites among subjects are indicated by the columns of boxes to the right of the tree as follows: not detected in any subject (clear box), <15% of the total number of clones assayed (yellow box), ≥15% of the total number of clones assayed (green box). The 15% cutoff for low and high abundance was chosen arbitrarily. Marker bar represents a 10% difference in nucleotide sequences.