Fig. 1From: A novel modified-indirect ELISA based on spherical body protein 4 for detecting antibody during acute and long-term infections with diverse Babesia bovis strainsROC curve analysis to determine optimal S/N ratio cutoff for the SBP4-based MI-ELISA. Data points in a represent 1,253 field sera categorized as B. bovis positive (light blue) or negative (orange) by IFA. Dark blue vertical line is 3Â S/N ratio cutoff for the MI-ELISA. b is the analysis on the area on the ROC curve with 3Â S/N ratio cutoffBack to article page