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Detection of the pig serum samples with inconsistent results between the developed cELISA and commercial IDEXX ELISA kit by IFA. (A) Three sera positive for cELISA and negative for the commercial IDEXX ELISA kit were tested by IFA. (B) Four clinical pig sera positive for cELISA and negative for the commercial IDEXX ELISA kit were tested by IFA. (C) The remaining 12 sera negative using cELISA and positive using the commercial IDEXX ELISA kit were tested by IFA.
