Table 2

Effect of weaning induced stress on total leukocyte, neutrophil and lymphocyte number, neutrophil:lymphocyte (N:L) ratio, eosinophil and monocyte number in weaned beef calves.

Gender

Location

s.e

Time

s.e.

P-Values




Variable

Male

Female

Near

Away

0

1

2

3

7

11

G

L

T

I




Total Leukocytes

9.9

9.7

9.4

10.2

0.40

9.8

10.5

9.8

9.7

10.5

8.8

0.41

NS

NS

NS

NS

(×103 cells/μL)

Neutrophils

3.1

2.6

2.5

3.2

0.29

2.3

3.5c

2.9b

2.9b

3.5c

2.2

0.27

NS

NS

***

**1

(×103 cells/μL)

Lymphocytes

7.1

6.7

6.8

6.9

0.13

7.2

7.2

6.8b

6.8b

6.9a

6.5c

0.13

*

NS

*

**2

(×103 cells/μL)

N:L

0.46

0.38

0.39

0.45

0.04

0.33

0.49c

0.43b

0.42b

0.52c

0.33

0.04

NS

NS

**

**3

(Ratio)

Eosinophils

0.12

0.13

0.12

0.13

0.01

0.13

0.10a

0.11

0.15

0.13

0.10b

0.01

NS

NS

NS

**4

(×103 cells/μL)

Monocytes

0.59

0.57

0.55

0.61

0.03

0.60

0.54

0.62

0.58

0.58

0.57

0.03

NS

NS

NS

NS

(×103 cells/μL)


The values are expressed as least squares means (Lsmeans) and s.e.

G = gender, L = location, T = time, I = interaction, NS = not significant (P > 0.05). * = P < 0.05, ** = P < 0.01, *** = P < 0.001.

a, b, cWithin rows, Lsmeans differ from pre-weaning baseline by P < 0.05, P < 0.01 and P < 0.001, respectively.

1Location × Time interaction, 1.9 vs 2.8, 2.6 vs 4.4, 2.5 vs 3.2, 2.7 vs 3.1, 3.6 vs 3.4, 2.1 vs 2.3 for near and away calves at time 0, 1, 2, 3, 7 and 11, respectively.

2Gender × Location interaction, 6.9 vs 6.4 and 6.7 vs 7.5 for near and away male and female, respectively; away male 6.4 vs away female 7.5.

3Location × Time interaction, 0.27 vs 0.38, 0.38 vs 0.59, 0.40 vs 0.45, 0.41 vs 0.42, 0.54 vs 0.48, 0.33 vs 0.33 for near and away calves at time 0, 1, 2, 3, 7 and 11, respectively.

4Gender × Time interaction, 0.12 vs 0.15, 0.12 vs 0.08, 0.14 vs 0.10, 0.17 vs 0.12, 0.13 vs 0.14, 0.08 vs 0.12 for male and female calves at time 0, 1, 2, 3, 7 and 11, respectively.

O'Loughlin et al. BMC Veterinary Research 2011 7:45   doi:10.1186/1746-6148-7-45

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