IFNG and tuberculosis: Buffalo TB tests include in vitro interferon-gamma (IFN-γ) release assays (IGRAs) and IFN-γ inducible protein 10 (IP-10) release assays (IPRA) that use a modified QuantiFERON-TB Gold Plus (QFT) In-tube antigen stimulation platform, and the in vivo single comparative intradermal tuberculin test (SCITT)4,5.