Table 3. Differentially abundant taxa in isolator vs. IVC samples.

Phylum	Class	Order	Family	Genus	p-value	Isolator abund.	IVCs abund.
Bacteroidetes	Bacteroidia	Bacteroidales	Rikenellaceae	RC9 gut group	<0.001	0.06%	3.18%
Firmicutes	Clostridia	Clostridiales	Unclassified	Unclassified	0.002	1.13%	0.56%
			Lachnospiraceae	Roseburia	0.001	0.12%	0.05%
			Ruminococcaceae	Unclassified	0.009	2.51%	1.86%
				Flavonifractor	0.002	0.11%	0.05%
				Unclassified	<0.001	1.01%	0.43%
				Ruminococcus	<0.001	0.19%	0.02%
Tenericutes	Mollicutes	RF9	Unclassified	Unclassified	0.016	0.23%	0.13%

Fecal samples from isolator and IVC-housed mice had different abundances of eight taxa. Abundance is the mean abundance of the group in percent (Kruskal-Wallis with 1000 permutations and Bonferroni correction test). Abund. = Abundance.