TABLE 2.

Fecal bacterial phyla and genera of adults who consumed control and walnut diets, each for 3 wk, in a crossover design¹

	Percentage of sequences
Phyla and genera	Control	Walnut	SEM	P
Firmicutes	82.4	87.2	2.83	0.04
Blautia	8.33	8.23	0.82	0.82
Coprococcus	7.56	6.99	0.74	0.25
Ruminococcus	6.19	5.17	0.85	<0.01
Dorea	3.21	2.58	0.39	<0.01
Streptococcus	2.07	1.98	1.03	0.80
Faecalibacterium	1.45	2.77	0.59	0.02
Roseburia	0.79	1.32	0.29	<0.01
Clostridium	0.72	1.07	0.13	0.01
Oscillospira2	0.51	0.37	0.06	0.04
Dialister	0.28	0.73	0.25	0.04
Lactobacillus	0.28	0.46	0.36	0.34
Lachnospira	0.23	0.26	0.06	0.63
Anaerostipes	0.22	0.26	0.05	0.30
Bacteroidetes	5.72	5.20	2.10	0.62
Bacteroides	4.88	4.60	1.81	0.77
Parabacteroides	0.13	0.16	0.07	0.48
Actinobacteria	8.19	5.00	1.90	0.02
Bifidobacterium	6.43	3.97	1.83	0.03
Collinsella2	0.10	0.05	0.26	0.07
Verrucomicrobia	3.26	1.77	0.96	0.41
Akkermansia	3.26	1.77	0.96	0.41
Proteobacteria	0.23	0.58	0.13	0.13
Firmicutes:Bacteroidetes3	1.64	1.73	0.21	0.54

¹Values are least-square means ± SEMs unless otherwise indicated; n = 18. Treatment effects were evaluated with the use of a mixed-model ANOVA.

²Values are mean log-normalized sequence abundances ± SEs.

³Values are least-square means ± SEMs of log-transformed Firmicutes-to-Bacteroidetes ratio.