Table 1.

Antibody titers against HEV in retained serum samples collected from pigs fed diets with or without spray dried porcine plasma ¹

SDPP 2	Pig ID	Day 0	Day 45
0%	28	Neg	Neg
0%	1000	Neg	Neg
0%	1027	Neg	Neg
0%	1049	0.752	Neg
0%	1050	1.188	Neg
8%	27	Neg	Neg
8%	999	Neg	Neg
8%	1026	Neg	Neg
8%	1047	1.302	Neg
8%	1048	1.139	Neg
8%	6964	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 collected from pigs weaned at 3 to 4 wks of age and fed diets with either 0% or 8% SDPP for 45 days [33]. Serum samples from pigs were stored at −80°C since the experiment was completed (April to October 2006) and retrospectively analyzed for the presence of HEV AB during April to May 2012.