Table 2.

Number of positive diagnostic evaluations on oral fluid for PRRSV and IAV-S by PCR at days 7, 63, and 105 in grow-finish pigs raised under commercial conditions¹

Item	LCh	MCh	HCh
PRRSV
Day 7	6/6	6/6	6/6
Day 63	6/6	6/6	6/6
Day 105	0/6	5/6	1/6
IAV-S
Day 7	0/6	5/6 H1N2	0/6
Day 63	0/6	6/6 H1N1	6/6 H1N1
Day 105	0/6	0/6	0/6

¹Three 1,000 pig grow-finish facilities, located on the same production site in Iowa, were each populated with 936 crossbred pigs (Cambrough female [PIC 1050] × DNA600 terminal sire); this study did not start until approximately 34 d post weaning (13.1 ± 0.2 kg of BW). Pigs remained on test until achieving marketing BW (130.5 ± 1.4 kg).