Table 3 Effect of exogenous adrenocorticotropic (ACTH) administration^a on haematology variables in beef heifers differing in phenotypic residual feed intake (RFI)

Neutrophils, × 10³ cells/μL

High

9.1

11.7

10.9

11.4

11.9

11.9

12.2

0.36

0.90

0.001

0.92

Low

8.5

11.3

10.8

12.2

12.9

11.9

11.7

0.41

Lymphocytes, × 10³ cells/μL

High

3.36

3.51

3.3

2.92

3.21

3.41

4.02

0.159

0.99

0.71

0.78

Low

3.88

3.38

3.16

3.07

3.55

3.32

3.27

0.175

Monocytes, × 10³ cells/μL

High

0.69

0.39

0.53

0.39

0.45

0.47

0.58

0.04

0.99

0.01

0.95

Low

0.7

0.5

0.68

0.39

0.49

0.38

0.42

0.045

Eosinophils, × 10³ cells/μL

High

0.18

0.08

0.21

0.12

0.12

0.12

0.36

0.027

0.85

0.001

0.06

Low

0.19

0.21

0.06

0.13

0.19

0.31

0.24

0.031

Basophils, × 10³ cells/μL

High

0.05

0.06

0.05

0.06

0.06

0.06

0.07

0.003

0.61

0.001

0.3

Low

0.05

0.05

0.05

0.06

0.07

0.06

0.06

0.003

WBC, × 10³ cells/μL

High

16.6

14.7

15.3

14

14.8

14.7

16.3

0.3

0.35

0.53

0.7

Low

15.4

16.2

16.1

15.3

16.6

15.4

15.3

0.34

RBC, × 10⁶ cells/μL

High

6.19

6.33

6.04

5.66

6.08

6.03

6.17

0.093

0.02

0.1

0.81

Low

5.89

6.66

6.42

6.41

6.53

6.43

6.57

0.107

HGB, g/dL

High

9.46

9.6

9.14

8.63

9.25

9.25

9.54

0.124

0.08

0.04

0.8

Low

8.77

9.94

9.6

9.51

9.78

9.62

9.81

0.142

HCT, %

High

23.6

24.3

23.1

21.8

23.3

22.9

23.6

0.36

0.02

0.06

0.87

Low

22.4

24.5

24.5

24.4

24.8

24.5

25.1

0.42

MCHC, g/dL

High

40.3

39.5

40

44.8

40.2

40.7

40.9

0.63

0.23

0.71

0.92

Low

44.3

38.7

38.7

38.8

39.2

39.1

38.8

0.74

PLT, × 10³ cells/μL

High

366.6

312.7

458.9

327

420.5

300.7

346.4

22.82

0.69

0.001

0.76

Low

309.3

329.4

405.2

269.1

436.3

274.4

310.4

26.11