(a) Reactivities (OD) in CSFV sp-ELISA of dilutions of BVDV-specific swine sera (4-b to 8-b), CSFV-specific swine sera (9-c to 13-c), and CSFV-specific HIS. (b) Reactivities in BVDV sp-ELISA of dilutions of BVDV-specific swine sera (4-b to 8-b), CSFV specific swine sera (9-c to 13-c) and CSFV-specific HIS. (c) Reactivities in CSFV sp-ELISA of dilutions of BVDV-specific bovine sera (1 to 5, r4590-51, r4590-52, and 841) and BVDV-specific HIS. (d) Reactivities in BVDV sp-ELISA of dilutions of BVDV-specific bovine sera (1 to 5, r4590-51, r4590-52, and 841) and BVDV-specific HIS. Blank, negative control serum.