Table 6.

Respiratory burst and phagocytic activity by innate immune cells from blood (days 1, 10, 14, and day 3 postinfection) and BAL (day 14 of the feeding period and day 10 postinfection) of calves supplemented with or without SCFP products for 31 d

	DHR1 activity, ΔMFI2						Phagocytic activity, ΔMFI
Blood	Control	SCFP3	SEM	Treatment effect P-value	Time effect P-value	Treatment × Time interaction P-value	Control	SCFP	SEM	Treatment effect P-value	Time effect P-value	Treatment × Time interaction P-value
PMN	45,036	56,239	9,415	0.119	<0.0001	0.785	306	285	142	0.427	0.196	0.437
Monocyte	42,072	31,038	8,586	0.414	<0.0001	0.013	355	430	76	0.460	0.010	0.280
BAL
PMN	60,147	86,385	13,528	0.316	0.0004	0.121	2,294	4,532	1,070	0.152	0.296	0.891
Macrophage	37,053	68,962	13,048	0.113	<0.0001	0.055	6,232	9,797	1,634	0.0006	0.031	0.366

¹DHR activity represents respiratory burst.

²MFI, mean fluorescence intensity.

³Calves fed SCFP received 1 g/d SCFP in milk and 5 g/d SCFP top-dressed on the starter for the 31 d.