Table 4.

Overall effects of weaning management and persistently infected bovine viral diarrhea virus exposure on hematology of newly received beef calves sampled on d 0, 14, and 28

	Auction market		Preconditioned			Contrasts,1P =
Item	Control	PI-exposed	Control	PI-exposed	SEM	Management	Exposure	Interaction
No. pens2	14	14	12	11
Total PBL3, n × 103/μL	8.53	8.68	10.77	10.98	0.39	< 0.001	0.62	0.94
Neutrophils, n/μL	2,344	2,407	2,599	2,403	161	0.41	0.66	0.39
Neutrophils, %	28.4	28.5	26.1	23.4	1.22	0.002	0.27	0.24
Lymphocytes, n/μL	4,886	5,040	6,784	7,255	358	< 0.001	0.35	0.64
Lymphocytes, %	55.3	56.1	60.2	63.6	1.60	< 0.001	0.18	0.38
Neutrophil:lymphocyte	0.64	0.67	0.53	0.45	0.04	< 0.001	0.47	0.13
Monocytes, n/μL	1,071	1,021	1,100	1,030	64.2	0.75	0.32	0.87
Monocytes, %	13.3	12.8	10.8	10.1	0.57	< 0.001	0.28	0.89
Eosinophils, n/μL	141	120	178	185	24.0	0.03	0.75	0.52
Eosinophils, %	1.7	1.4	1.7	1.8	0.23	0.38	0.58	0.39
Red blood cells, n × 106/μL	9.60	9.86	9.75	9.92	0.14	0.40	0.10	0.71
Hemoglobin, g/100 mL	11.64	11.95	11.88	12.08	0.15	0.18	0.07	0.69
Hematocrit, %	34.9	35.9	35.5	36.0	0.44	0.36	0.09	0.59
Platelets, n × 103/μL	555.6	542.1	459.3	461.6	29.0	0.002	0.84	0.77

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

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

³Total number of peripheral blood leukocytes (PBL; includes neutrophils, lymphocytes, monocytes, eosinophils, and basophils)