Table 3.

Pseudorabies virus (PRV) isolation from tissues

Group	Days after inoculation with PRRSVa	No. of pigs	No. of positive pigs
			Medula oblongata	Tonsil	Lung	Lymph node	Heart	Liver	Spleen	Kidney	Small intestine
												Pulmonary	Mesentric
PRRSV–PRV	14	3	1 (1.0b)	3 (2.3)	2 (2.6)	1 (1.8)	0	0	0	0	0	0
	21	3	0	0	0	0	0	0	0	0	0	0
PRRSV	14, 21	4	0	0	0	0	0	0	0	0	0	0
PRV	14	3	2 (0.9)	2 (3.0)	1 (1.25)	1 (1.3)	0	0	0	1 (0.8)	0	1 (1.5)
	21	3	0	1 (2.0)	0	0	0	0	0	0	0	0
Control	21	4	0	0	0	0	0	0	0	0	0	0

^aPorcine reproductive and respiratory syndrome virus.

^blog TCID₅₀/0.05 ml. Virus titre or geometric mean virus titre of positive tissue samples.