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. 2022 Jul 22;19:121. doi: 10.1186/s12985-022-01851-w

Fig. 2.

Fig. 2

Optimizations 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 test