TABLE 2.

Phylum-level taxonomic composition of the ruminal epithelial bacterial communities at different ages in kids^a

Phylum	% of sequences at the following age (days):					SEM	P valueb
	0	7	28	42	70		L	Q
Actinobacteria	0.24	0.22	1.86	1.18	1.28	0.51	0.096	0.139
Bacteroidetes	1.57	3.31	12.80	8.61	10.57	3.77	0.088	0.227
Chloroflexi	0.00	0.01	0.80	0.22	0.42	0.11	0.013	0.014
Fibrobacteres	0.00	0.01	0.06	0.49	0.18	0.24	0.344	0.453
Firmicutes	1.94	7.06	16.99	54.71	40.29	4.84	<0.0001	0.009
Fusobacteria	1.18	0.85	0.04	0.00	0.00	0.61	0.151	0.363
Proteobacteria	90.13	86.29	60.65	28.64	45.42	4.74	<0.0001	0.0003
TM7	0.03	0.01	0.01	0.29	0.17	0.08	0.067	0.562
Thermi	0.23	1.21	1.13	1.31	0.00	0.49	0.511	0.051
Unclassified	4.63	0.81	0.74	4.06	1.12	1.73	0.565	0.891
Others (<0.5%)	0.06	0.23	4.94	0.50	0.54	0.15	0.025	0.600

^aData for the top 9 phyla are shown.

^bL, linear; Q, quadratic.