. Author manuscript; available in PMC: 2014 Aug 8.

Published in final edited form as: Arch Virol. 2013 Feb 8;158(6):1275–1285. doi: 10.1007/s00705-013-1612-z

Table 2. Determination of neutralizing antibody titers.

Vaccine	NA titer^a
0.5 μg of VLPs	None
1.0 μg of VLPs	None
2.0 μg of VLPs	1:20
4.0 μg of VLPs	1:40
PRRSV inactivated vaccine	None

NA titers were determined by the fluorescence focus neutralization assay with serum samples collected from mice vaccinated with different doses of the VLPs and the PRRSV inactivated vaccine