Table 2.

Effects of weaning management and persistently infected bovine viral diarrhea virus exposure on performance of newly received beef calves

	Auction market		Preconditioned			Contrast,1P =
Item	Control	PI-exposed	Control	PI-exposed	SEM	Management	Exposure	Interaction
No. pens2	14	14	12	11
BW, kg
Initial	249	248	250	249	9.26	0.36	0.43	0.58
d 14	257	258	273	273	9.75	< 0.001	0.60	0.72
d 28	270	270	285	286	9.09	< 0.001	0.57	0.73
d 42	286	283	301	299	7.51	< 0.001	0.19	0.71
ADG, kg
d 0 to 14	0.54	0.77	1.64	1.66	0.19	< 0.001	0.16	0.20
d 0 to 28	0.74	0.81	1.25	1.32	0.15	< 0.001	0.10	0.97
d 28 to 42	1.10	0.89	1.13	0.90	0.15	0.77	0.003	0.87
d 0 to 42	0.86	0.84	1.21	1.18	0.10	< 0.001	0.29	0.99

¹Management = main effect of weaning management (auction market vs. preconditioned); Exposure = main effect of PI-BVDV exposure (control vs. persistently infected bovine viral diarrhea virus exposure); Interaction = management × exposure.

²Each pen consisted of 8 to 11 animals depending on block.