FIG. 5.

Results of study of recombinant antigens by IFN-γ whole-blood-based assay in TST-positive (•; n = 79) and -negative (neg [○]; n = 22) animals. Results are expressed as the scatter plot of the ODIs. ODIs (points) and means (horizontal bars) for infected animals are shown. According to the recommendations of the Office des International Epizooties, in Argentina, the cutoff point for positivity of the TST is >5 mm (skin thickness), for suspected infection is 3 to 5 mm, and for negativity is <3 mm. Error bars show standard deviations.