Table 3.

Number of positive, doubtful and negative samples in Ab ELISA compared to the ratio [VNT titer for BDV / VNT titer for BVDV-1 or BVDV-2]

	VNT Titre BDV/ Titre BVDV				Total
	> 4 x	2–3 x	<  2 x	Neg
ELISA Ab results
Doubt	19	7	6a	4	36
Pos	63	8	18	–	89
Neg	21	–	2a	49	72
Total	103	15	26	53	197

> 4 x / 2–3 x / < 2 x: VNT titer for BDV compared to VNT titer for BVDV-1 or BVDV-2 more than fourfold higher / between two and threefold higher / less than twofold higher

Pos: positive

Neg: negative

Doubt: doubtful

^aincluding 1 sample with high BVDV-2 Titer