Figure 3.
Neutralizing activity after immunoglobulin transfer. ELISA-based serum neutralizing assays against PRRSV VR2332 on MARC 145 cells from 32 animals in passive transfer of immunoglobulin study. Neutralizing activity at (A) time of Ig administration, (B) 24 hours post Ig administration (time of viral challenge), (C) 15 days, and (D) 22 days post Ig administration, for pigs receiving neutralizing (NAb n= 12), non-neutralizing (nNAb n= 12), PRRSV-negative (neg Ab n= 4) or no (no Ab n= 4) immunoglobulins.