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


Days post-weaning

P-values1


Variable

0

2

7

14

Pooled s.e.m.

T

S

T×S


CD62L+2, MFI3

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, MFI3

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, MFI3

CS

13.0

10.7

16.8

14.3

0.71

NS

NS

NS

NCS

14.8

12.9

14.8

13.0


T = treatment, S = sampling time, T × S = treatment × sampling time interaction.

CS = concentrate supplement prior to abrupt weaning (n = 10). NCS = no concentrate supplement prior to abrupt weaning (n = 10).

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).

2CD62L = L-selectin marker.

3Mean fluorescence intensity = MFI.

Lynch et al. BMC Veterinary Research 2012 8:1   doi:10.1186/1746-6148-8-1

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