Egyptian Rousette Bat (Rousettus aegyptiacus) Interferon-Gamma (IFN-γ) is a type II interferon produced primarily by activated T lymphocytes and natural killer (NK) cells, where it plays a central role in cell-mediated immunity and antiviral defense. IFN-γ signals through the IFN-γ receptor complex (IFNGR1/IFNGR2), activating JAK/STAT1 pathways and inducing genes involved in macrophage activation, antigen presentation (including upregulation of MHC class I and II molecules), and coordination of cytotoxic T-cell responses. As a natural reservoir host for filoviruses such as Marburg virus, R. aegyptiacus exhibits unique immune regulatory characteristics, and IFN-γ is critical for understanding how this species mounts effective antiviral Th1-type responses while limiting excessive inflammation and immunopathology. Studies of Egyptian Rousette Bat IFN-γ contribute to insights into viral persistence, immune tolerance, and balanced pro-inflammatory signaling during experimental filovirus infection models. Characterization of IFN-γ in this species supports reservoir host immunology research, development of species-specific immune reagents, and comparative studies aimed at understanding differential disease outcomes between bats and more susceptible mammals, enhancing translational research into emerging zoonotic viral infections.