Table 2.

Effects of intake and energy level on log transformed haptoglobin and titer levels over time

	Dieta					P-valuec
Item	0.99/100	1.10/95	1.21/90	1.32/85	SEMb	Diet	Day	Diet × Day
No. of pens	8	8	8	8
No. of animals	29	32	29	29
Haptoglobin,mg/dLg						0.26	<0.01	0.64
Day 0	2.7	2.6	3.2	2.6	0.26
Day 14	3.6	3.0	3.5	3.3	0.26
Day 27	3.1	3.0	3.1	3.0	0.27
IBRd, titer levelf,g,i						0.62	<0.01	0.94
Day 0	0.3	0.7	0.4	0.3	0.30
Day 14	2.5	2.9	2.2	2.5	0.30
Day 27	2.8	3.0	2.9	2.7	0.30
BVD-Ie, titer levelf,g,i
Day 0	1.0	1.4	0.8	1.0	0.41	0.89	<0.01	0.99
Day 14	3.9	4.0	3.9	3.7	0.41
Day 27	5.7	5.7	5.7	5.6	0.41
BVD-IIe, titer levelf,i						0.92	<0.01	0.99
Day 0	1.4	1.3	1.1	1.2	0.59
Day 14	3.1	3.0	2.6	3.2	0.59
Day 27	4.0	4.3	3.8	4.2	0.59

^aTreatment diets offered based on DMI of 0.99/100 treatment intake that was offered for ad libitum intake. First number = Mcal NE_g/kg DM. Second number = % of 0.99/100 treatment offered on DM basis.

^bLargest value across treatments for each time point is reported.

^cFixed effects of dietary treatment, day, and dietary treatment × day interaction.

^dStands for Infectious Bovine Rhinotracheitis.

^eStands for Bovine Viral Diarrhea type 1 (BVD-I) and 2 (BVD-II).

^fLinear effect of day (P < 0.0001).

^gQuadratic effect of day (P < 0.01).

^hQuadratic effect of day (P < 0.0001).

ⁱDilution factor of serum at which viral neutralization was not detectable.