Table 4.

Blood metabolites of finishing steers fed a diet supplemented with antibiotics (ANT), active dried yeast (ADY), encapsulated ADY (EDY), or mixture of ADY and EDY (MDY)

	Treatments1
Item	Control	ANT	ADY	EDY	MDY	SEM	P <
Animal#2	10	10	10	10	10
BUN3, mg/dL
Day 0	6.71	6.44	7.09	7.07	6.87	0.45	0.85
Day 56	12.81	14.62	14.21	15.29	13.12	0.79	0.10
Day 112	10.29	12.25	10.81	12.21	12.07	0.69	0.10
Linear	0.01	0.01	0.01	0.01	0.01
Quadratic	0.01	0.01	0.01	0.01	0.01
Glucose, mg/dL
Day 0	99.30	99.23	95.08	85.63	91.50	6.22	0.45
Day 56	81.42	75.63	75.86	80.46	75.85	4.55	0.82
Day 112	85.42b	82.65b	79.39b	87.80a,b	95.23a	3.35	0.02
Linear	0.02	0.01	0.01	0.80	0.53
Quadratic	0.03	0.01	0.03	0.26	0.01
NEFA, mM
Day 0	0.20	0.17	0.24	0.25	0.26	0.04	0.43
Day 56	0.11	0.18	0.15	0.13	0.14	0.02	0.10
Day 112	0.13b	0.20a	0.14b	0.15b	0.15b	0.02	0.03
Linear	0.04	0.29	0.01	0.01	0.01
Quadratic	0.06	0.85	0.16	0.02	0.03

^a,bLeast square means within a row with different superscripts differ (P < 0.05).

¹Control = no yeast and no antibiotics; ANT (330 mg monensin + 110 mg tylosin·steer⁻¹d⁻¹); ADY (1.5 g ADY·steer⁻¹d⁻¹); EDY (3 g·steer⁻¹d⁻¹; EDY consisted of 1.5 g ADY and 1.5 g capsule material); and MDY (1.5 g ADY + 3.0 g EDY·steer⁻¹d⁻¹); Treatment × days on-feed was significant at P < 0.05 for blood urea N and blood glucose concentrations and at P < 0.08 for blood NEFA.

²Ten steers from each treatment group were randomly selected for blood and fecal sample collection (Tables 4, 5 and 6).

³BUN = blood urea N