Fig. 2From: Construction of a quadruple gene-deleted vaccine confers complete protective immunity against emerging PRV variant challenge in pigletsIdentification of PRV GDFS-delgI/gE/US9/US2 by immunofluorescence assay. PK-15 cells were infected with either the PRV GDFS strain or the PRV GDFS-delgI/gE/US9/US2 strain and were analyzed by IFA using anti-gB MAb or anti-gE MAb as the primary antibody and FITC-conjugated goat anti-mouse antibody as the secondary antibody. Scale bar indicates 100 μmBack to article page