Table 12-2. Mean value of serum analytes for steers grazing endophyte free and endophyte infected tall fescues.†

Item

 

E- tall fescue

(n = 8)

E+ tall fescue

(n = 8)

P > F

 

Reference

range‡

Albumin, g/100 mL

3.58 ± 0.05

3.71 ± 0.05

0.051

3.0-3.55

Albumin/globulin ratio

1.10 ± 0.04

1.32 ± 0.04***

0.001

0.84-0.94

Alkaline phosphatase, U/L

84.4 ± 5.6

76.6 ± 5.6

0.330

0.01-488

Alanine aminotransferase, U/L

37.8 ± 1.8

31.3 ± 1.8**

0.010

11-40

Aspartate aminotransferase, U/L

86.3 ± 4.9

75.3 ± 4.7

0.110

78-132

Cholesterol, mg/100 mL

107.0 ± 4.2

91 ± 4.2**

0.006

80-120

Creatinine, mg/100 mL

1.38 ± 0.04

1.58 ± 0.04***

0.001

1.0-2.0

Estradiol, pg/mL§

 

7.25 ± 0.71

 

6.59 ± 0.56

 

-

 

-

 

Gamma glutamyl transferase, U/L

 

12.9 ± 0.6

 

13.2 ± 0.6

 

0.711

 

6.1-17.4

 

Globulin, g/100 mL

 

3.37 ± 0.07

 

2.97 ± 0.07***

 

0.001

 

3.0-3.48

 

Glucose, mg/100 mL

 

79 ± 4.9

 

72 ± 4.9

 

0.277

 

45-75

 

Lactic dehydrogenase, U/L

 

926 ± 29

 

860 ± 28

 

0.103

 

692-1445

 

Prolactin, ng/mL

 

214 ± 57

 

13.2 ± 57*

 

0.012

 

-

 

Total bilirubin, mg/100 mL

 

1.63 ± .04

 

1.74 ± 0.04*

 

0.042

 

0.01-0.5

 

Total protein, g/100 mL

 

6.93 ± .09

 

6.68 ± 0.08*

 

0.037

 

6.74-7.46

 

Urea N, mg/100 mL

 

16.1 ± 0.42

 

16.2 ± 0.41

 

0.898

 

20-30

 

* P < .05; ** P < .01; *** P < .001. From Oliver et al. (2000a).

† Repeated measures ANOVA. Twenty different bleed dates, April-Aug. 1996 to 1998. Least square means (±SEM).

‡ Taken from Kaneko et al. (1997) and Clinical Chemistry Service, College of Veterinary Medicine, University of Tennessee.

§ Estradiol values were determined only in 1998 (49 samples from steers grazing E- tall fescue and 52 samples from steers grazing E+ tall fescue).

 

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Tall Fescue Monograph