Table 2.

Concentration of volatile fatty acids (VFA) in ascending colon contents and feces ¹.

	Diet		Pooled SEM	p-Value
Item	Control	Test
Ascending Colon
DM, %	23.77	23.95	0.677	0.849
SCFA absolute, μmol/g DM
Acetate	47.34	56.40	6.043	0.304
Propionate	23.72	23.05	2.831	0.869
Butyrate	9.82	10.35	1.442	0.798
Total SCFA	80.88	89.80	9.800	0.528
SCFA relative, % of total
Acetate	59.12	63.00	2.334	0.067
Propionate	28.92	25.75	1.660	0.018
Butyrate	11.95	11.27	0.747	0.479
BCFA absolute, μmol/g DM
Isovalerate	5.61	4.32	0.703	0.203
Valerate	2.48	2.47	0.298	0.976
Isobutyrate	3.76	2.80	0.444	0.136
Total BCFA	12.30	9.58	1.553	0.222
BCFA relative, % of total
Isovalerate	45.96	44.96	1.808	0.319
Valerate	23.12	26.18	2.547	0.046
Isobutyrate	30.90	28.86	0.846	0.037
Feces
DM, %	30.15	32.00	1.922	0.437
SCFA absolute, μmol/g DM
Acetate	43.09	30.33	4.953	0.080
Propionate	15.59	9.80	2.912	0.111
Butyrate	5.91	3.83	1.586	0.154
Total SCFA	73.39	43.95	11.30	0.051
SCFA relative, % of total
Acetate	68.82	70.57	3.516	0.606
Propionate	21.40	21.43	1.362	0.986
Butyrate	9.86	7.99	2.309	0.294
BCFA absolute, μmol/g DM
Isovalerate	5.07	3.67	0.825	0.248
Valerate	2.31	1.48	0.466	0.116
Isobutyrate	3.20	2.33	0.485	0.224
Total BCFA	10.61	7.49	1.671	0.195
BCFA relative, % of total
Isovalerate	48.00	48.81	0.927	0.545
Valerate	21.56	19.79	1.349	0.305
Isobutyrate	30.45	31.40	0.815	0.279

¹ Pigs received diets containing 0 (Control) or 250 (Test) mg of bovine milk OPN per L of mixed milk replacer during a 30-d feeding study (n = 11 male pigs for control group and 10 male pigs for test group). Bolded p-values denote differences between treatment means (p < 0.05). Abbreviations: BCFA, branched-chain fatty acids; DM, dry matter; OPN, osteopontin; SCFA, short-chain fatty acids; SEM, standard error of the mean; VFA, volatile fatty acids.