TABLE 1.

Optical density of P. gingivalis strains after 24 h of incubation with galactose

Description	Galactose (%)	Strain	Average OD600 after 24 h	Fold change (with gal/no gal)	P valuea
Encapsulated strains		W50	1.35
	0.1	W50	3.43	2.54	6.4E−05
		W83	1.62
	0.1	W83	3.92	2.42	7.2E−05
Nonencapsulated strains		33277	2.00
	0.1	33277	3.52	1.76	6.4E−04
		381	2.08
	0.1	381	3.65	1.75	1.1E−04
Capsule status not determined		AJW4	2.22
	0.1	AJW4	3.95	1.78	2.9E−03
Capsule null W83		W83	1.65
	0.1	W83	3.97	2.40	3.4E−04
		W83 ΔPG0106	1.71
	0.1	W83 ΔPG0106	3.75	2.20	2.2E−07
W83 fucP		W83	1.88
	0.1	W83	3.96	2.11	2.0E−03
		W83 ΔPG2170	1.84
	0.1	W83 ΔPG2170	3.25	1.77	2.1E−04
381 rel		381	2.00
	0.1	381	3.48	1.74	4.0E−05
		381 Δrel	2.08
	0.1	381 Δrel	2.92	1.40	5.7E−03
381 gingipain mutant		381	NDb
	0.1	381	3.83	ND	ND
		381 ΔrpgA	2.43
	0.1	381 ΔrpgA	4.13	1.70	2.1E−04

^aDetermined by the Student's t test.

^bND, not determined.