Table 5.

Fecal pH, IgA, and E. coli counts in finishing steers fed a diet supplemented with Saccharomyces cerevisiae fermentation product (SCFPns), encapsulated Original XPC (eXPC) or antibiotics (ANT)¹

	SCFPns, g/d							P-value2
Item	0	12	15	18	eXPC	ANT	SEM	Treat	L	Q
No. of steers	10	10	10	10	10	10
Fecal pH
Day 0	6.19	6.40	6.49	6.25	6.28	6.23	0.12	0.42	0.28	0.15
Day 28	6.22b	6.37b	6.22b	6.63a	6.49ab	6.74a	0.10	0.01	0.04	0.13
Day 56	6.23	6.17	6.38	6.30	6.54	6.63	0.14	0.18	0.61	0.71
Day 105	6.37	6.38	6.60	6.52	6.60	6.66	0.10	0.17	0.16	0.65
IgA, µg/g
Day 0	2.41	2.34	2.29	1.28	1.07	1.78	0.50	0.25	0.24	0.20
Day 28	1.39	2.11	1.93	1.92	1.17	1.18	0.44	0.49	0.31	0.54
Day 56	5.29	5.67	7.61	6.18	5.26	5.09	1.18	0.66	0.36	0.90
Day 105	3.78ab	4.42a	3.28ab	4.56a	1.82b	5.12a	0.78	0.05	0.71	0.23
E. coli counts3
Day 0	7.15	7.21	7.45	7.32	7.39	7.43	0.14	0.58	0.24	0.97
Day 28	7.28bc	7.09c	7.61a	7.24bc	7.44ab	7.51ab	0.13	0.05	0.62	0.72
Day 56	7.42a	6.93b	7.30ab	7.14b	7.25b	7.43a	0.11	0.02	0.07	0.08
Day 105	7.50	7.14	7.15	7.17	7.18	7.31	0.12	0.23	0.02	0.35

¹ANT = 330 mg monensin + 110 mg tylosin/d; eXPC = 16 g eXPC/d.

²Treat = treatment; L, Q = linear and quadratic effects of SCFPns (0, 12, 15, and 18 g/d); treatment × day was significant (P < 0.01).

³ E. coli counts showed on log₁₀ basis.

^a-cMeans within a row with different superscripts differ (P < 0.05).