Concordance between the ELISA S/P value and IFA results.

<p>The Table presents the results of 596 sera analyzed by ELISA and IFA.</p

ROC curve.

<p>The curve presents the true positive rate (or sensitivity) in function of false positive rate for different cut-off points. Each point on the ROC curve represents a sensitivity/specificity pair corresponding to a particular decision threshold.</p

Coomassie blue staining of the N protein.

<p>After purification steps, different elution fractions of purified N recombinant protein were separated by SDS-PAGE in a 12% polyacrylamide gel and stained with coomassie blue.</p