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Fig. 2 | BMC Veterinary Research

Fig. 2

From: Development and comparison of enzyme-linked immunosorbent assays based on recombinant trimeric full-length and truncated spike proteins for detecting antibodies against porcine epidemic diarrhea virus

Fig. 2

Distribution of the results of the immunostaining and commercial N-based ELISA. The immunostaining titers of each serum sample were presented as logarithms with the base 10. Serum samples which were negative for the immunostaining are denoted by 0. The results of the commercial N-based ELISA kit were presented by the sample to positive ratio (S/P ratio). S/P ratio = [(sample OD – mean OD of negative controls) / (mean OD of positive controls – mean OD of negative controls)]. The dotted line represents the threshold of an S/P ratio of 0.6 of the commercial N-based ELISA, as per the manufacturer’s instructions. C-N (with grey square icon): conventional PEDV naïve pigs; C-I (with black square icon): experimental PEDV inoculated conventional pigs; SPF-N (with grey round icon): specific pathogen free PEDV naïve pigs; SPF-I (with black round icon): experimental PEDV inoculated SPF pigs; Sow-F (with black triangle icon): PEDV-feedback sows

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