Table 8.

Bacterial taxonomy within the cecal digesta of broilers at the phylum level (four dominant species) ¹.

Items 2	Se, mg/kg	Pros, %	Bacteroidetes	Firmicutes	Proteobacteria	Actinobacteria
I-Se	0.2	0	67.84	30.70	1.00	0.06
O-Se	0.2	0	68.51	21.88	9.06	0.10
I-Se + pros	0.2	0.5	68.20	30.57	0.83	0.06
O-Se + pros	0.2	0.5	82.60	16.25	0.51	0.17
SEM			7.35	7.20	1.17	0.17
Main effect means 3
Se-S 3	Inorganic		68.02	30.63	0.92	0.06
	Organic		75.56	19.06	4.79	0.13
	SEM		13.98	13.00	4.90	0.08
Pros		0	68.18	26.29	5.03	0.08
		0.5	75.40	23.41	0.67	0.11
		SEM	13.98	13.00	4.90	0.08
p-value
Treatment			0.673	0.638	0.304	0.505
Se-S			0.468	0.244	0.296	0.226
Pros			0.486	0.762	0.244	0.539
Se-S × Pros 4			0.507	0.772	0.261	0.539

¹ Data are means with the SEM derived from ANOVA error mean square for n = 10. ² I-Se, basal diet containing 0.2 mg/kg sodium selenite; O-Se, basal diet containing 0.2 mg/kg selenium yeast; I-Se + pros, basal diet containing 0.2 mg/kg sodium selenite and 0.5% probiotics; O-Se + pros, basal diet containing 0.2 mg/kg selenium yeast and 0.5% probiotics. ³ Se-S, Main effect of selenium source; Pros, Main effect of probiotics; Se-S + Pros, Main effect of selenium source plus probiotics. ⁴ Interaction between Se source and probiotics level.