Table 3:

Regression results (GLM) between the milk quality parameters of 3874 samples compared with BoHV-1-positive and BoHV-1-negative antibodies status. Values are means±se (n=1331 samples from 462 cows always positive and n=2819 samples from 916 cows always negative)

Milk quality parameters	Positive samples	Negative samples	P value
Fat *	3.90±0.073	3.71±0.030	0.045
Protein*	3.39±0.025	3.32±0.014	0.2
Lactose*	4.68±0.025	4.82±0.010	<0.0001
ESM*	8.81±0.045	8.87±0.019	0.3
Log(som cells)†	2.26±0.059	1.95±0.025	<0.0001
Urea‡	98.18±3.86	90.37±1.58	0.1

*%.

†Somatic cell count (x1000/ml).

‡ mg/L.

ESM, dry non-fat-milk-material content; GLM, generalized linear model.