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Fig. 3 | BMC Veterinary Research

Fig. 3

From: Development of monoclonal antibodies and serological assays including indirect ELISA and fluorescent microsphere immunoassays for diagnosis of porcine deltacoronavirus

Fig. 3

Production and reactivity of serological reference standards and internal quality control standards for both ELISA (a) & FMIA (b). Reference serum standards were titrated 2-fold in antigen coated wells at a fixed concentration [250 ng/well] in order to gauge a maximum signal-to-noise ratios for each assay c ELISA, and d FMIA. Arrows indicate the optimal serum dilution that resulted in the greatest positive to negative (P/N) ratio for the test

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