Table 1 Overview of phylogenetic distribution of gastrointestinal tract inhabitants (A–P, see table footnote) that have been detected by culturing and by small subunit ribosomal RNA gene library sequence analysis. The cut-off value of SSU rRNA sequence similarity that is used for phylotype definition is 97%.

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Reference (first author)
Cultured	33	31	0	208	13	41	11	1	0	6	67	4	18	2	1	0	Rajilić-Stojanović5

Healthy total microbiota	0	1	0	15	3	12	0	0	0	0	0	0	0	0	0	0	Zoetendal22
	0	15	0	40	13	24	0	0	0	0	0	0	0	0	0	0	Suau23
	0	5	0	17	4	13	0	0	0	0	0	0	0	0	0	0	Bonnet24
	9	1	0	8	0	5	0	0	0	0	2	0	0	0	0	0	Favier25
	0	0	0	15	3	9	0	0	0	0	0	0	0	0	0	0	Wang26
	0	8	0	25	4	15	0	0	2	6	5	0	0	0	0	0	Wang27
	1	12	0	43	7	28	2	0	0	3	6	0	0	0	1	0	Wang28
	8	18	0	115	26	58	0	0	0	2	2	1	0	0	0	0	Hayashi29
	4	6	0	45	12	21	0	0	0	0	0	0	0	0	1	0	Hayashi30
	0	16	0	55	15	17	0	0	0	1	4	2	0	0	0	0	Hayashi31
	0	9	0	37	9	24	0	0	0	2	1	0	0	0	0	0	Hold32
	10	62	1	301	81	93	1	0	4	5	2	4	1	0	1	0	Eckburg33 *
	16	59	0	251	100	84	0	0	0	4	5	4	0	0	2	0	Saunier, unpublished

Ulcerative colitis	0	1	0	29	9	14	0	0	0	0	0	0	0	0	0	0	Hutson, unpublished

Crown	4	23	0	111	34	49	1	0	0	1	3	0	0	0	1	0	Mangin34

Specific primers	0	0	0	20	0	0	0	0	0	0	0	0	0	0	0	0	Heilig35
	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	Satokari36
	0	0	0	14	2	9	0	0	0	0	0	7	0	0	0	2	Rajilić-Stojanović5

Specific substrates/activity	1	0	0	24	3	20	0	0	0	0	0	0	0	0	0	0	Barcenilla7; Duncan37
	0	0	0	22	1	19	0	0	0	0	2	1	0	0	1	0	Derrien38
	6	9	0	59	11	37	0	0	1	0	3	0	0	0	0	0	Leitch39

*The cut-off value of small sub-unit rRNA sequence similarity that is used for phylotype definition is 99%.
A, Actinobacteria; B, Bacteroidetes; C, Cyanobacteria; D, Firmicutes (all); E, Clostridium cluster IV; F, Clostridium cluster XIVa; G, Fucobacteria; H, Lentisphaerae; I, Alpha-Proteobacteria; J, Beta-Proteobacteria; K, Gamma-Proteobacteria; L, Delta-Proteobacteria; M, Epsilon-Proteobacteria; N, Spirochaetes; O, Verrucomicrobia; P, TM7 phylum.