FIG.1.

Phylogenetic tree of bacterial species or phylotypes of six phyla identified from the tongue dorsa of healthy subjects and subjects with halitosis. The information presented includes bacterial species or phylotype clone and sequence accession numbers. Novel phylotypes are definedas those taxa that are <98.5 to 99% similar in sequence comparisons to their closest relatives. Species or phylotypes detected only on the tongue dorsum and not at any other oral site are highlighted in red. Color-coordinated characters indicate health status category or some other site at which each species was identified. Bar, 5% difference in nucleotide sequence. ANUG, acute necrotizing ulcerative gingivitis; NUP, necrotizing ulcerative periodontitis.