IFNG and Tuberculosis, Bovine: In particular, using the test interpretation criterion recommended by the manufacturer, that is the same approved by the EU reference laboratories for bovine tuberculosis (SOP/004/EURL) (30), the diagnostic sensitivity of the IFN-γ test was 94.7% [Confidence Interval (CI) 95%, 92.3–96.5], and the specificity was 98.5% (CI 95%, 98.5–96.9).