Fig. 4From: 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 virusThe sensitivity of CSFV Erns and BVDV tE2 -based ELISAs. A Evaluation of the sensitivity of CSFV Erns -based ELISA using serially swine sera with different neutralizing antibody (NAb) titers. P1, P2 and P3, anti-CSFV positive sera; N1, CSFV-free serum. The number in brackets indicated the NAb titer. B Evaluation of the sensitivity of BVDV tE2 -based ELISA using serially swine sera with different NAb titers. P1, P2 and P3, anti-BVDV positive sera; N1, BVDV-free negative serum. The number in brackets indicated the NAb titerBack to article page