Table 4.

PRV-specific neutralizing antibodies in piglets following immunization with PRV GX-ΔTK/IES and challenge with the PRV GX strain

Group	Days post-immunization (days post-challenge)
	7	14(0)	21(7)	28(14)
PRV GX-ΔTK/IES	< 2	5.28 ± 2.59	22.12 ± 8.14	103.90 ± 31.68
Bartha-K61	< 2	3.56 ± 3.10	18.45 ± 4.89	91.49 ± 33.87
DMEM	< 2	< 2	< 2	16.20 ± 15.54a

^aNeutralizing antibody levels determined from the two animals that survived challenge with PRV GX strain.