TABLE 2.

Abundance of phyla identified in the entire sample, and by endodontic infection type.

	Entire sample		Primary Infections		Persistent Infections		P
Phyla	abundance	detected	abundance	detected	abundance	detected	A1	D2
Bacteroidetes	0.362	1.00	0.354	1.00	0.371	1.00	0.8	1.0
Firmicutes	0.329	1.00	0.356	1.00	0.302	1.00	0.4	1.0
Actinobacteria	0.081	0.98	0.086	1.00	0.076	0.96	0.7	1.0
Synergistetes	0.074	0.81	0.110	0.92	0.037	0.71	0.4	0.1
Fusobacteria	0.074	0.88	0.037	0.83	0.111	0.92	0.09	0.7
Proteobacteria	0.052	0.88	0.040	0.79	0.064	0.96	0.02	0.2
Spirochaetes	0.019	0.83	0.012	0.83	0.025	0.83	0.1	1.0
Tenericutes	0.005	0.27	<0.0005	0.12	0.010	0.42	0.03	0.05
TM7	0.001	0.27	0.001	0.17	0.001	0.38	0.2	0.2
Chloroflexi	<0.0005	0.19	<0.0005	0.08	0.001	0.29	0.07	0.1
SR1	<0.0005	0.08	<0.0005	0.08	<0.0005	0.08	0.9	1.0
other	0.002	0.94	0.002	0.96	0.002	0.92	0.9	1.0

¹Comparison of abundance between primary and persistent infections, derived from Wilcoxon rank-sum tests

²Comparison of number of samples where phylum was identified, derived from Fisher’s Exact tests