Log-transformed wild dog (Lycaon pictus) interferon-γ (IFN-γ) concentrations in plasma from whole blood incubated in the QuantiFERON^®-TB Gold (QFT) Nil (unstimulated) or QFT tuberculosis (TB) Antigen (TB antigens) tubes, or with mitogens (PWM/QFT Plus Mitogen tube) from Mycobacterium bovisunexposed (Ann van Dyk Cheetah Centre) and -exposed (Kruger National Park) animals, measured using the R&D Quantikine canine IFN-γ enzyme-linked immunosorbent assay kit. Median IFN-γ values are shown by horizontal bars. Significant differences are indicated as * (P<0.05) or *** (P<0.001).