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Table 4 Effect of concentrate supplementation for 26 d pre-weaning on neutrophil surface expression of CD62L, and neutrophil phagocytic and oxidative burst activity in abruptly weaned and housed beef calves

From: Effect of pre-weaning concentrate supplementation on peripheral distribution of leukocytes, functional activity of neutrophils, acute phase protein and behavioural responses of abruptly weaned and housed beef calves

   Days post-weaning   P-values1
Variable   0 2 7 14 Pooled s.e.m. T S T×S
CD62L +2 , MFI 3 CS 35.2a 20.19b 35.6a 35.2a 2.24 NS * NS
  NCS 36.2a 17.3b 36.0a 34.0a     
Phagocytosis, % CS 81.1a 71.2b 78.0a 83.2a 1.99 NS * NS
  NCS 80.5a 73.2b 74.8a 80.0a     
Phagocytosis, MFI 3 CS 12.9 10.7 16.8 14.3 0.97 NS NS NS
  NCS 14.7 12.9 14.8 13.01     
Oxidative burst, % CS 26.0 29.4 33.1 27.3 2.34 NS NS NS
  NCS 24.2 23.9 26.4 25.0     
Oxidative burst, MFI 3 CS 13.0 10.7 16.8 14.3 0.71 NS NS NS
  NCS 14.8 12.9 14.8 13.0     
  1. T = treatment, S = sampling time, T × S = treatment × sampling time interaction.
  2. CS = concentrate supplement prior to abrupt weaning (n = 10). NCS = no concentrate supplement prior to abrupt weaning (n = 10).
  3. 1Levels of significance: NS = P > 0.05, * = P < 0.05, ** = P < 0.01, *** = P < 0.001. a, b, cWithin a row, least squares means without a common superscript differ (P <0.05).
  4. 2CD62L = L-selectin marker.
  5. 3Mean fluorescence intensity = MFI.