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Table 3 Effect of abruptly weaning at housing on phagocytic and oxidative burst positive neutrophils in beef calves.

From: Effect of abrupt weaning at housing on leukocyte distribution, functional activity of neutrophils, and acute phase protein response of beef calves

  

Days (d) relative to housing

P-values1

Neutrophils, %

 

-7

02

2

7

14

T

S

T × S

Phagocytosis positive

C

87.2 ± 2.00

88.8 ± 1.98

79.4x ± 3.20

87.4 ± 2.48

89.6 ± 2.18

0.003

< 0.0001

0.02

 

W

87.0 ± 2.00

89.6a ± 1.98

61.3b, y ± 3.20

79.7a ± 2.48

89.3a ± 2.18

   

Oxidative burst positive

C

36.5 ± 3.93

36.6 ± 2.14

45.1 ± 4.83

46.1 ± 5.24

40.3 ± 5.82

0.5

0.2

0.7

 

W

34.7 ± 3.93

37.0 ± 2.14

41.3 ± 4.83

37.2 ± 5.24

40.1 ± 5.82

   
  1. 1T = treatment, S = sampling time, T × S = treatment × sampling time interactions.
  2. W = abruptly weaned, C = non-weaned (control) calves.
  3. a, b, cWithin a row, least squares means without a common superscript differ (P = 0.01).
  4. x, yWithin a column (day) for each variable, least squares means without a common superscript differ (P = 0.03). 2Baseline is defined as d 0 for each variable. Data presented are least squares means ± s.e.m.