Table 6. Effects of different protease and nutrient density feed on fecal microflora in growing-finishing pigs

Items (Log10 CFU/g)	High1)			Basal			SE	Den		Pro			p-value
	CON	PTA	PTB	CON	PTA	PTB		High	Basal	CON	PTA	PTB	Den	Pro	Den× Pro
E. coli
6 wk	6.48	6.52	6.60	6.51	6.46	6.50	0.131	6.54	6.49	6.50	6.49	6.55	0.644	0.882	0.856
13 wk	6.52	6.58	6.61	6.52	6.51	6.51	0.149	6.57	6.51	6.52	6.54	6.56	0.633	0.969	0.929
Lactobacillus
6 wk	7.81	7.90	7.09	7.39	7.93	7.84	0.275	7.57	7.78	7.65	7.91	7.47	0.588	0.238	0.116
13 wk	9.33	9.57	9.35	9.19	9.56	9.13	0.260	9.41	9.29	9.26	9.57	9.24	0.573	0.341	0.923

High nutrient density is 0.94%–0.98% higher than requirement in dietary protein and 50 kcal/kg in energy than basal nutrient density.
High, high nutrient density diet; Basal, basal nutrient density diet; Den, different nutrient density diet; Pro, supplementation of protease; CON, basal diet; PTA, CON + 0.0125% protease A; PTB, CON + 0.010% protease B; Den × Pro, different nutrient density diet × supplementation of protease; E. coli, Escherichia coli.