. 2003 Jan 22;50(1):14–19. doi: 10.1046/j.1439-0450.2003.00605.x

Table 2.

Porcine reproductive and respiratory syndrome virus (PRRSV) isolation from tissues

Group	Days after inoculation with PRRSV	No. of pigs	No. of positive pigs
			Medulla oblongata	Tonsil	Lung	Lymph node		Heart	Liver	Spleen	Kidney	Small intestine
			Medulla oblongata	Tonsil	Lung	Pulmonary	Mesentric	Heart	Liver	Spleen	Kidney	Small intestine
PRRSV–PRV	14	3	0	2 (2.0^a )	2 (4.6)	1 (2.5)	0	1 (1.0)	0	1 (0.8)	1 (0.5)	0
	21	3	0	3 (3.7) A	3 (3.3) A	3 (1.7)	1 (1.3)	0	0	1 (0.8)	1 (0.8)	1 (0.8)
PRRSV	14	2	0	2 (2.9)	2 (4.0)	2 (0.5)	1 (0.8)	0	0	1 (0.8)	0	0
	21	2	0	2 (2.6) B	2 (1.9) B	2 (0.5)	1 (0.5)	0	0	1 (1.0)	0	0
PRV	14, 21	6	0	0	0	0	0	0	0	0	0	0
Control	21	4	0	0	0	0	0	0	0	0	0	0

^alog TCID₅₀/0.05 ml. Virus titre or geometric mean virus titre of positive tissue samples. Different letters within a column denote a significant difference (P < 0.05).