Fig. 2From: The recombinant Erns and truncated E2-based indirect enzyme-linked immunosorbent assays to distinguishably test specific antibodies against classical swine fever virus and bovine viral diarrhea virusOptimizations of CSFV Erns and BVDV tE2 -based ELISA procedures. A & C Optimization of the concentration of coating antigen and the dilution of swine sera for CSFV Erns (A) or BVDV tE2 (C) -based ELISA using checkerboard titration test. B & D Optimization of the dilution of the secondary antibody for CSFV Erns (B) or BVDV tE2 (D) -based ELISA. P/N, positive control/negative control; ☆, the optimized condition for ELISA testBack to article page