Effect of Bacillus subtilis and Bacillus licheniformis supplementation in diets with low- and high-protein content on ileal crude protein and amino acid digestibility and intestinal microbiota composition of growing pigs

Table 7 Ileal gene copy numbers^a in ileal digesta of growing pigs

	High-protein		Low-protein		SEM	P-value
Item	-	+	-	+	SEM	P¹	B²	P × B³
Total bacteria	8.9	9.1	8.4	9.1	0.30	0.286	0.070	0.226
Lactobacillus spp.	7.9	8.8	6.9	7.1	0.44	0.002	0.109	0.279
Bifidobacterium spp.	6.2	6.4	5.3	6.0	0.32	0.024	0.179	0.354
Roseburia spp.	7.1	7.3	6.5	7.7	0.33	0.834	0.033	0.111
Enterobacteriaceae	7.7	7.9	7.4	8.3	0.43	0.836	0.139	0.274
Bacteroides-Prevotella-Porphyromonas	8.1^b,c	8.2^b,c	7.6^c	8.6^b	0.26	0.968	0.013	0.042
Clostridium cluster IV	5.6	5.7	5.2	5.9	0.30	0.735	0.185	0.324
Bacillus spp.	8.0	8.3	7.5	8.1	0.23	0.100	0.054	0.498

¹ P-value of protein level
² P-value of probiotic supplementation with Bacillus spp.
³ P-value of interaction between protein level and probiotic supplementation with Bacillus spp.
^alog₁₀ 16S rRNA gene copies/g digesta (LS means and standard error of the means)
^b,cWithin a row, LS means with a common superscript are not different at α = 0.05

ISSN: 2049-1891