Table 2. Differentially abundant taxa between the generations of IVC-housed mice.

Phylum	Class	Order	Family	Genus	p-value	F1 abund.	F2 abund
IVCs 4 weeks
Bacteroidetes	Bacteroidia	Bacteroidales	Rikenellaceae	Alistipes	<0.01	13.04%	4.99%
				RC9 gut group	<0.001	6.88%	0.87%
Firmicutes	Bacilli	Bacillales	Staphylococcaceae	Staphylococcus	<0.01	0.00%	0.37%
		Lactobacillales	Lactobacillaceae	Lactobacillus	<0.001	29.95%	59.94%
	Clostridia	Clostridiales	Clostridiaceae	SFB	<0.001	4.78%	0.56%
IVCs 11 weeks
Bacteroidetes	Bacteroidia	Bacteroidales	Rikenellaceae	Alistipes	0.019	11.07%	17.23%
Firmicutes	Clostridia	Clostridiales	Clostridiaceae	SFB	<0.001	0.25%	1.21%
Proteobacteria	Deltaproteobac.	Desulfovibrionales	Desulfovibrionaceae	Desulfovibrio	0.015	0.45%	1.00%

Taxa of fecal samples from IVC mice aged 4 and 11 weeks had different abundances in F1 and F2 generations. Abundance is given as mean abundance of the group in percent (Kruskal-Wallis with 1000 permutations and Bonferroni correction test). Abund. = Abundance.