No transmission of hepatitis E virus in pigs fed diets containing commercial spray-dried porcine plasma: a retrospective study of samples from several swine trials

Table 2 Antibodies titers against HEV in serum samples from pigs fed diets containing spray dried porcine plasma and challenged with PRRSV ^1,2

SDPP Group³	PRRSV Challenge⁴	Pig ID	Day 0	Day 28
8%	Yes	37	Neg	Neg
8%	Yes	40	1.011	0.446
8%	Yes	59	Neg	Neg
8%	Yes	63	Neg	Neg
8%	Yes	64	Neg	Neg
0%	Yes	41	Neg	Neg
0%	Yes	44	Neg	Neg
0%	Yes	46	Neg	Neg
0%	Yes	47	Neg	Neg
0%	Yes	48	0.586	Neg
0%	Yes	57	Neg	Neg
8%	No	68	Neg	Neg
8%	No	70	Neg	Neg
8%	No	72	0.429	Neg
8%	No	75	Neg	Neg
8%	No	78	Neg	Neg
8%	No	79	Neg	Neg
0%	No	84	Neg	Neg
0%	No	87	Neg	Neg
0%	No	88	Neg	Neg
0%	No	97	0.317	Neg
0%	No	98	Neg	Neg
0%	No	99	Neg	Neg

¹Optical density values analyzed by ELISA. Neg means that the O.D. value is below the cut-off established for the technique (<0.300).
²Serum samples from pigs were stored at −80°C since the experiment [34] was completed (April to October, 2006) and retrospectively analyzed for the presence of HEV AB during April to May, 2012.
³Respective control or SDPP groups of pigs were fed diets containing 0% or 8% SDPP for 28 days.
⁴Indicated if the pigs were intranasal challenged with PRRSV.