Table 2.

Proportion of PRRSV-positive animals by viral isolation on MA104 cells.

	Proportion of viremic animals at the indicated days of infection*
Treatment	Pig age	0	1	3	8	11	14	21	28	35	42	49	56	63
ATP	Piglet	0/10	0/10	0/10	7/10	8/10	8/10	9/10	8/10	8/10	3/10	3/10	2/10	0/10
	Finisher	0/10	0/10	3/10	2/10	1/10	0/10	2/10	0/10	0/10	0/10	0/10	0/10	0/10
	Adult	0/10	0/10	4/10	5/10	4/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10
JA142	Piglet	0/10	9/9	9/9	9/9	9/9	9/9	6/7	4/7	0/6	0/6	0/6	0/6	0/6
	Finisher	0/10	8/10	10/10	4/9	0/9	0/9	0/9	0/8	0/8	0/8	0/8	0/8	0/8
	Adult	0/10	9/10	10/10	7/10	0/10	0/9	0/9	0/8	0/8	0/8	0/8	0/7	0/6
None	Piglet	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10
	Finisher	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10
	Adult	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10	0/10

* All groups with at least one positive animal are shown in bold.