TABLE 5.

Interspecific 16S rRNA gene sequence similarities between species or phylotypes

Phylogroup and species	% gene sequence similarities (range)
	T. vincentii	T. sinensis (Treponema sp. IA)	Treponema sp. IB	Treponema sp. IC
Phylogroup 1
T. medium	98.9 (98.8–99.0)	98.9	99.3 (99.2–99.6)	99.0 (99.0–99.1)
T. vincentii		98.6 (98.5–98.7)	98.7 (98.4–99.0)	98.5 (98.3–98.8)
T. sinensis			98.9 (98.8–99.0)	99.3 (99.2–99.5)
Treponema sp. IB				99.0 (98.8–99.1)
	T. putidum
Phylogroup 2
T. denticola	98.4 (97.8–99.3)