IFNG and mastitis: Furthermore, variations in serum Interleukin 8 (IL-8), Interferon-gamma (IFN-γ), transforming growth factor β1 (TGF-β1), and overall haptoglobin concentration patterns have been identified among dairy cows infected with different S. aureus strains, enhancing the capacity to identify pathogenic strains at the strain level in mastitis cases [81].