Table 2.

Detection rate of subgingival plaque and tongue‐coating bacteria in feces

	Taxon including oral species a	Detected in both feces and subgingival plaque (%)			Detected in both feces and tongue coating (%)
		Adult	Elderly	P value	Adult	Elderly	P value
Bacterial taxa significantly higher in elderly
Eggerthella	No	63.3	72.4	.64	6.7	41.4	<.01**
Corynebacterium	Yes	0.0	13.8	.05	0.0	31.0	<.01**
Butyricimonas	No	36.7	48.3	.52	3.3	31.0	<.01**
YS2;f	No	0.0	37.9	<.01**	0.0	13.8	.05
Lactobacillales;f	Yes	0.0	17.2	.02*	0.0	0.0	1.00
Mogibacterium	Yes	0.0	17.2	.02*	6.7	37.9	<.01**
Christensenellaceae;g	No	46.7	79.3	.02*	13.3	55.2	<.01**
Dehalobacterium	No	10.0	58.6	<.01**	0.0	34.5	<.01**
SMB53	No	6.7	20.7	.15	0.0	17.2	.02*
Pseudoramibacter_Eubacterium	Yes	30.0	20.7	.60	0.0	13.8	.05
Peptococcaceae;g	Yes	0.0	37.9	<.01**	0.0	24.1	<.01**
Ruminococcaceae; Other	Yes	36.7	69.0	.03*	23.3	48.3	.08
Bulleidia	Yes	3.3	20.7	.05	16.7	44.8	.04*
RF32;f	No	13.3	48.3	<.01**	6.7	24.1	.08
Bilophila	No	60.0	93.1	<.01**	43.3	72.4	.05*
Desulfovibrio	Yes	16.7	69.0	<.01**	13.3	65.5	<.01**
Campylobacter	Yes	0.0	27.6	<.01**	6.7	37.9	<.01**
RF39;f	No	3.3	58.6	<.01**	3.3	55.2	<.01**
TM7‐3;o	Yes	3.3	24.1	.03*	16.7	27.6	.49
Akkermansia	No	36.7	72.4	.01*	26.7	62.1	.01*
Bacterial taxa significantly higher in adults
Lactococcus	Yes	76.7	48.3	.05*	76.7	48.3	.05*
Megamonas	No	26.7	0.0	<.01**	23.3	0.0	.01*
Megasphaera	Yes	46.7	10.3	<.01**	46.7	10.3	<.01**

Note: Intergroup differences were analyzed using the χ ² or Fisher test.

^aSpecies registered as oral taxa in Human Oral Microbiome Database.

^* P < .05.

^** P < .01.