Table 4. The mean relative abundance (%) of selected genera in each group.

Genus	Control (n = 20)	tcdB positive (n = 79)	P	tcdB positive
				low tcdB (n = 49)	high tcdB (n = 30)	P	colonizer (n = 21)	CDI (n = 58)	P
Bacteroides	20.25	22.22	0.539	19.17	27.21	0.093	18.61	23.53	0.353
Prevotella	8.22	1.22	0.001	1.29	1.01	0.844	0.60	1.44	0.483
Sutterella	2.91	2.00	0.396	1.39	2.99	0.154	2.60	1.78	0.447
Bifidobacterium	2.13	0.53	0.124	0.59	0.43	0.678	0.37	0.59	0.603
Phascolarctobacterium	1.97	0.55	0.033	0.51	0.63	0.759	0.54	0.56	0.962
Haemophilus	1.96	0.21	0.040	0.16	0.29	0.615	0.01	0.29	0.320
Lachnospira	1.59	0.37	0.004	0.39	0.34	0.900	0.74	0.24	0.361
Coprococcus	1.29	0.48	0.008	0.55	0.37	0.516	0.47	0.48	0.969
Parabacteroides	1.28	4.12	0.000	4.29	3.84	0.760	5.04	3.78	0.441
Oscillospira	1.22	2.04	0.061	1.39	3.11	0.070	3.99	1.34	0.032
Streptococcus	1.17	0.66	0.250	0.83	0.40	0.179	0.51	0.72	0.619
Dialister	0.88	0.18	0.031	0.07	0.36	0.092	0.22	0.17	0.743
Butyricimonas	0.64	0.18	0.009	0.15	0.21	0.688	0.53	0.05	0.067
Enterococcus	0.56	8.70	0.000	12.8	0.89	0.001	8.86	8.65	0.964
Catenibacterium	0.53	0.00	0.018	0.00	0.00	-	0.00	0.00	-
Veillonella	0.52	2.38	0.005	1.54	3.75	0.115	1.38	2.74	0.331
Faecalibacterium	0.48	0.10	0.000	0.10	0.10	0.981	0.09	0.10	0.826
Paraprevotella	0.48	0.08	0.019	0.05	0.13	0.361	0.04	0.10	0.567
Odoribacter	0.46	0.12	0.008	0.05	0.24	0.216	0.53	0.05	0.419
Anaerostipes	0.38	0.01	0.019	0.00	0.02	0.298	0.04	0.00	0.232
Klebsiella	0.05	0.75	0.000	0.68	0.89	0.596	0.46	0.85	0.302
Akkermansia	0.01	0.14	0.025	0.01	0.35	0.022	0.26	0.09	0.222

Abbreviation: CDI, C. difficile infection. Only genera with mean relative abundance >1.0 or >0.1 with significant differences were described in Table 4.