The IFN-γ level was significantly higher in the group of individuals at higher risk of recent M.tuberculosis exposure (recent healthy family contacts and HCW) (median, 1.48, IQR 0.16–5.56 IU/ml) compared to the whole HCA group (p<0.0001) and to the HIV-uninfected HCA group (p = 0.0002), but was not significantly different than the whole PTB group (p = 0.20). This evidence concerns the gene IFNG and hepatocellular adenoma.