IFNG and tuberculosis: Existing laboratory tests for TB are mainly performed from pathogenic and host perspectives, including smear staining microscopy (Steingart et al., 2007; Parsons et al., 2011), culture, nucleic acid amplification test (Bautista-De Los Santos et al., 2016), M. tuberculosis gamma interferon release assay (TB-IGRA) (Ai et al., 2019), and purified protein derivative (PPD) test (Stavri et al., 2012).