Figure 8.

Peptide competition for neutralizing antibodies. Effect on PRRSV infection by two different peptide concentrations (1 and 10 µg/ml) for each of six synthetic peptides, and mixture of the six peptides and incubated with PRRSV-neutralizing serum (1/32 dilution) for 1 h. PRRSV VR2332 (MOI 0.5) was then incubated with the peptide-serum mixture for 1 h prior to inoculation of MARC 145 cells. Data are shown relative to viral growth in the absence of peptide addition.