Plasma Vitamin E and Blood Selenium Concentrations in Norwegian Dairy Cows: Regional Differences and Relations to Feeding and Health

Table 3 Plasma α-tocopherol (μg/ml) and blood selenium (μg/g) concentrations in sampled cows with or without recorded treatments for selected diseases in the same lactation. Means and standard deviations (in brackets)

Disease:	Mastitis (all) (COWMAST)	Acute mastitis (COWACMA)	Repro. disorders (COWREPRO)	Ketosis (COWKETOS)	Partur. Paresis (COWPARES)
With recorded treatments
No. of cows¹	80	56	35	60	31
Plasma α-toc	7.2 (3.4)	7.5 (3.7)	7.2 (3.6)	6.8 (3.2)	6.0 (3.5)
No. of cows¹	77	53	33	58	30
Blood Se	0.16 (0.05)	0.16 (0.04)	0.16 (0.04)	0.14 (0.04)*	0.15 (0.04)
Without recorded treatments
No. of cows	205	229	250	225	254
Plasma α-toc	6.8 (2.8)	6.8 (2.8)	6.9 (2.9)	7.0 (2.9)	7.1 (2.9)
No. of cows	197	221	241	216	244
Blood Se	0.15 (0.05)	0.15 (0.05)	0.15 (0.05)	0.16 (0.05)*	0.15 (0.05)

¹ Due to limited material, some samples were analysed for a-tocopherol only. See Materials and methods.
*These two values are significantly different (p < 0.02).

ISSN: 1751-0147