Fig. 4From: Two nanobody-based immunoassays to differentiate antibodies against genotype 1 and 2 porcine reproductive and respiratory syndrome virusDetecting the pig serum samples with inconsistent results between the g1-2-cELISA and commercial IDEXX X3 ELISA kit by IFA and g2-cELISA. The remaining 11 sera negative using g1-2-cELISA and positive using the commercial IDEXX ELISA kit and g2-cELISA were tested by IFA. Four clinical pig sera are positive for g1-2-cELISA, and negative for the commercial IDEXX ELISA kit were tested by IFA. “ + ” represented positive, and “-” represented negativelyBack to article page