Table 3

Effect of concentrate supplementation for 26 days pre-weaning on total leukocyte and differential populations in abruptly weaned and housed beef calves


Days post-weaning

P values1


Cell type,

×103cells/μL

0

1

2

3

7

14

Pooled s.e.m.

T

S

T×S


Total leukocytes

CS

10.5

11.3

10.4

10.1

10.0

9.3

0.52

NS

NS

NS

NCS

10.3

10.7

9.6

9.9

9.8

10.0

Neutrophils

CS

2.5a

4.2b

3.7b

2.5a

2.8a

2.3a

0.31

NS

***

NS

NCS

2.6a

4.8b

3.9c

2.7a

2.7a

2.7a

Lymphocytes

CS

7.3a

5.2b

5.3b

6.6a

6.7a

6.6a

0.33

NS

**

NS

NCS

6.7a

4.9b

5.0b

6.0a

7.1a

6.4a

Monocytes

CS

0.68a

0.61ab

0.58ab

0.61ab

0.63ab

0.37b

0.063

NS

**

NS

NCS

0.73

0.69

0.70

0.73

0.82

0.51

Eosinophils

CS

0.21

0.26

0.21

0.17

0.10

0.16

0.048

NS

NS

NS

NCS

0.22

0.20

0.24

0.26

0.15

0.19

Basophils

CS

0.09

0.11

0.12

0.11

0.08

0.13

0.029

NS

NS

NS

NCS

0.11

0.10

0.09

0.09

0.08

0.10


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 < 0.01, *** P < 0.001. a, b, cWithin a row, least squares means without a common superscript differ (P <0.05).

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

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