Table 2.

Effect of Bacillus subtilis PB6 and/or chromium propionate supplementation on serum chemistry variables^a of beef cattle during the feedlot receiving period

	Treatmentb					P-value
Item	CON	CST	CHR	CST + CHR	SEMc	CST	CHR	CST × CHR
Blood urea nitrogen, mg/dL	8.22	8.46	8.79	8.57	0.30	0.97	0.26	0.46
Creatinine, mg/dL	1.19	1.19	1.15	1.13	0.04	0.70	0.17	0.77
Alanine aminotransferase, U/L	19.55	20.25	20.02	26.66	0.76	0.39	0.57	0.97
Alkaline phosphatase, U/L	111.36	107.49	104.53	113.6	7.81	0.74	0.96	0.41
Aspartate aminotransferase, U/L	69.38	70.39	77.51	75.78	3.20	0.91	0.04	0.67
Total bilirubin, mg/dL	0.2854	0.2948	0.2896	0.2823	0.0078	0.89	0.60	0.29
Glucose, mg/dL	94.74	92.76	93.95	99.34	3.06	0.58	0.25	0.23
Calcium, mg/dL	10.27	10.39	10.06	10.19	0.09	0.14	0.02	0.98
Total protein, g/dL	6.96	6.80	6.90	6.90	0.09	0.40	0.82	0.40
Albumin, g/dL	2.45	2.45	2.37	2.37	0.05	1.00	0.11	0.93
Globulin, g/dL	4.50	4.36	4.52	4.54	0.10	0.52	0.30	0.41
Sodium, mmol/L	135.82	135.00	135.91	136.05	0.31	0.27	0.07	0.12
Potassium, mmol/L	5.20	5.30	5.29	5.39	0.07	0.14	0.18	0.96
Chlorine, mmol/L	94.81	95.06	95.53	95.33	0.28	0.93	0.09	0.43
Total CO2, mmol/L	25.72	26.59	25.57	25.07	0.44	0.70	0.06	0.12

^aSerum chemistry analysis conducted using VetScan VS2 Preventative Care Profile Plus, Abaxis, Union City, CA.

^bCON = negative control; CST = 13 g per animal daily DM inclusion of prepared Bacillus subtilis PB6 product (CLOSTAT, Kemin Industries, Des Moines, IA); CHR = 450 ppb DM chromium propionate (KemTRACE Chromium, Kemin Industries); CST + CHR = 13 g per animal daily DM inclusion of prepared Bacillus subtilis PB6 product + 450 ppb DM chromium propionate.

^cStandard error of the least square mean.