Table 6.

Log10 copies of bacterial genomic DNA of total bacteria and selected bacterial groups per g of fresh feces of puppies from 20 to 52 weeks of age fed the inorganic (SeInorg) and the organic (SeOrg) selenium supplemented diet.

	Age (weeks)							Selenium source				Gender
	20	28	36	44	52	SEM	P value	SeInorg	SeOrg	SEM	P value	F	M	SEM	P value
Total bacteria	8.92b	10.1a	9.85a	10.1a	10.1a	0.164	<0.001	9.79	9.84	0.117	0.607	9.37	9.89	0.131	0.336
Clostridium cluster I	5.63c	6.58b	6.80b	6.86b	7.42a	0.238	<0.001	6.81	6.50	0.187	0.143	6.55	6.77	0.221	0.505
Escherichia coli	7.51a,b	8.13a	7.44b	7.30b,c	7.07c	0.245	0.001	7.58	7.40	0.172	0.055	7.64	7.34	0.204	0.213
Enterococci spp.	6.17b	7.24a	7.43a	7.17a	7.35a	0.170	<0.001	6.99	7.15	0.109	0.141	7.05	7.09	0.119	0.789
Faecalibacterium prausnitzii	5.16c	6.47b	7.71a	7.70a	7.63a	0.180	<0.001	6.97	6.90	0.142	0.328	6.84	7.02	0.142	0.713
Lactobacillus spp.	5.55b	7.87a	7.73a	7.58a	7.68a	0.310	<0.001	7.09	7.47	0.309	0.024	7.17	7.39	0.184	0.182
Bifidobacterium spp.†	5.48b	7.25a	6.92a	7.01a	7.30a	0.212	<0.001	6.65	6.94	0.140	0.143	6.53	7.06	0.129	0.002

SEM: standard error of the mean.

Letters from gender designate: F: female; M: male.

^a–cValues in the same row that share a common superscript are not statistically different (P > 0.05).

^†Interaction between selenium source and age tended to be significant (P < 0.1).