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Sensitivity of cELISA using the PRRSV-N-Nb1-HRP fusion protein as a probe. Comparisons of the sensitivity between cELISA (A) and the commercial IDEXX ELISA kit (B) for detecting the sequential serum samples from the three challenged pigs with NADC30-like strain. (C) Distribution of the PI values by detecting the clinical positive sera for anti-PRRSV antibodies using cELISA. (D) Determination of the largest dilution of positive pig sera for anti-PRRSV antibodies.
