Table 6.

Relative abundance of jejunal mucosa-associated microbiota at the genus level in nursery pigs fed diets with increasing levels of xylanase

Item	Xylanase, XU per kg feed					SEM	P-value
	0	220	440	880	1,760		Linear	Quad1	0 vs. Xyl2
Clostridium	17.40	18.37	6.70	7.88	8.78	6.70	0.311	0.355	0.362
Helicobacter	13.34	19.59	10.47	14.09	12.59	11.99	0.845	0.969	0.940
Prevotella	10.13	4.09	10.17	16.84	17.36	8.65	0.234	0.620	0.827
Pelomonas	9.04	6.74	8.76	5.85	5.71	2.00	0.224	0.694	0.294
Microbacterium	3.53	3.39	3.38	2.20	2.22	0.75	0.226	0.621	0.216
Turicibacter	2.59	5.61	0.22	7.47	0.85	4.04	0.747	0.421	0.819
Massilia	2.14	3.99	7.76	0.97	7.84	3.79	0.232	0.595	0.258
Campylobacter	1.45	1.04	1.01	2.54	0.62	0.85	0.697	0.219	0.853
Selenomonas	1.40	0.11	0.71	1.75	0.46	0.88	0.805	0.534	0.400
Cupriavidus	1.33	0.66	1.20	0.63	0.70	0.20	0.073	0.286	0.027
Acinetobacter	1.28	2.05	2.88	3.41	0.78	1.51	0.575	0.042	0.371
Herbaspirillum	1.28	1.55	1.71	0.51	2.51	0.81	0.251	0.155	0.671
Sphingomonas	1.27	1.08	1.50	1.01	1.06	0.25	0.464	0.991	0.697
Megasphaera	1.26	0.53	0.54	0.28	0.23	0.31	0.063	0.184	0.023
Arthrobacter	1.14	0.41	0.41	0.34	0.45	0.28	0.259	0.117	0.027
Mitsuokella	1.10	0.65	1.48	0.71	0.80	0.54	0.665	0.990	0.731
Succinivibrio	1.10	0.71	0.82	4.04	2.71	1.04	0.076	0.276	0.395
Ralstonia	0.53	0.79	0.68	0.42	0.55	0.19	0.528	0.810	0.679
Roseburia	0.47	0.35	0.88	0.82	0.66	0.56	0.629	0.442	0.621
Actinobacillus	0.42	0.48	0.27	3.40	0.65	1.48	0.662	0.238	0.644
Bifidobacterium	0.36	0.38	1.49	0.90	0.22	0.53	0.532	0.639	0.769
Streptococcus	0.35	1.24	1.20	0.90	0.36	0.51	0.474	0.185	0.262
Telluria	0.27	0.53	0.89	0.12	1.09	0.52	0.100	0.377	0.197
Pseudomonas	4.89	5.80	12.44	5.03	13.29	3.09	0.060	0.757	0.160
Lactobacillus	4.84	3.98	4.86	1.21	1.66	2.42	0.256	0.671	0.487
Methylobacterium	1.77	2.23	2.08	1.00	1.94	0.67	0.787	0.479	0.958
Propionibacterium	1.66	2.46	2.98	3.50	2.04	1.24	0.889	0.124	0.300
Others	13.63	12.09	12.50	13.08	14.45	5.37	0.707	0.755	0.868

Quadratic.

Xylanase (220 + 440 + 880 + 1,760 XU per kg feed).