Bovine Interleukin-8 (IL-8), also known as CXCL8, is a potent pro-inflammatory chemokine that plays a central role in innate immune responses in cattle (Bos taurus) by mediating neutrophil chemotaxis, activation, and migration to sites of infection or tissue injury. Produced by macrophages, epithelial cells, endothelial cells, and mammary gland cells in response to bacterial components, viral infection, and inflammatory cytokines, bovine IL-8 signals primarily through CXCR1 and CXCR2 receptors to activate downstream pathways that promote leukocyte recruitment and amplification of acute inflammation. IL-8 is especially important in economically significant conditions such as mastitis, bovine respiratory disease (BRD), endometritis, and enteric infections, where elevated IL-8 levels drive neutrophil infiltration into affected tissues, contributing to both pathogen clearance and inflammatory tissue damage. In the mammary gland, IL-8 is a key mediator of somatic cell recruitment during intramammary infection and serves as an early biomarker of mastitis severity and treatment response. In animal health and translational research, characterization of bovine IL-8 supports studies of mucosal immunity, host-pathogen interactions, inflammatory regulation, and genetic factors influencing disease resistance, while also providing comparative insights into neutrophil-driven inflammatory processes relevant to human respiratory and inflammatory diseases.