Table 4.

Plasma acute phase protein concentration in steers fed a diet supplemented with, Saccharomyces cerevisiae fermentation product (SCFPns), encapsulated Original XPC (eXPC) or antibiotics (ANT)¹

	SCFPns, g/d							P-value3
Item2	0	12	15	18	eXPC	ANT	SEM	Treat	L	Q
No. of steers	10	10	10	10	10	10
Hp, μg/mL
Day 0	1535b	1094c	1243c	1173c	1176c	1898a	123.5	0.01	0.03	0.28
Day 28	140	141	128	132	136	128	6.3	0.50	0.27	0.52
Day 56	146	133	130	146	124	124	9.3	0.31	0.59	0.19
Day 105	124bc	126bc	128b	146a	113c	126bc	5.5	0.01	0.04	0.03
LBP, μg/mL
Day 0	743a	516b	413bc	336c	335c	753a	67.6	0.01	0.01	0.01
Day 28	135	145	161	109	104	97	35.3	0.72	0.89	0.41
Day 56	57	101	106	84	80	95	13.7	0.14	0.05	0.09
Day 105	79	83	103	112	87	103	12.6	0.35	0.09	0.30
SAA, μg/mL
Day 0	84.7	74.0	46.1	63.5	62.0	76.6	11.81	0.28	0.07	0.89
Day 28	7.2bc	18.7a	9.0bc	10.2b	11.8b	3.0c	2.27	0.01	0.26	0.01
Day 56	9.5c	23.9ab	31.9a	10.6c	9.2c	13.5bc	4.71	0.01	0.13	0.01
Day 105	13.2	19.4	28.6	29.5	22.2	22.4	4.46	0.14	0.01	0.50

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

²Hp = haptoglobin; SAA = serum amyloid A; LBP = lipopolysaccharide binding protein.

³Treat = treatment; L, Q = linear and quadratic effects of SCFPns (0, 12, 15, and 18 g/d); treatment × day was significant (P < 0.01).

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