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. 2021 Dec 29;2021:7336848. doi: 10.1155/2021/7336848

Figure 4.

Figure 4

ELISA cross-reactivity in bovine sera infected with Mycobacterium bovis. Corrected OD at 405 nm (OD405nm sample minus OD405nm buffer) obtained by the polyprotein-ELISA (a) and PPA-ELISA (b) of the 95 evaluated sera (47 sera from healthy bovines and 35 sera from M. bovis-infected bovines) for the analysis of the cross-reactivity with M. bovis. The dashed line indicates the cutoff point selected by the analysis of ROC curves for each ELISA. Wilcoxon analysis showed significant differences between the PTB-free and TB-infected groups (P < 0.0001).