Bovine Intercellular Adhesion Molecule-1 (ICAM-1, CD54) is a transmembrane glycoprotein member of the immunoglobulin superfamily that plays a critical role in leukocyte adhesion, trafficking, and inflammatory signaling in cattle (Bos taurus). Expressed on endothelial cells, epithelial cells, macrophages, and other immune and tissue-resident cells, bovine ICAM-1 is upregulated in response to pro-inflammatory cytokines such as TNF-α, IL-1β, and IFN-γ. It binds to β2 integrins, including LFA-1 (CD11a/CD18) and Mac-1 (CD11b/CD18), on leukocytes to mediate firm adhesion and transmigration of neutrophils and lymphocytes across the endothelium into inflamed tissues. Elevated ICAM-1 expression has been associated with economically significant bovine diseases such as mastitis, bovine respiratory disease (BRD), endometritis, and enteric infections, where enhanced leukocyte infiltration contributes to both pathogen clearance and tissue pathology. In the mammary gland, ICAM-1 facilitates neutrophil migration during intramammary infection and serves as a marker of inflammatory activation. In animal health and research applications, characterization of bovine ICAM-1 supports studies of host-pathogen interactions, vascular inflammation, immune cell recruitment, and evaluation of therapeutic or vaccine strategies aimed at modulating inflammatory responses to improve cattle health, productivity, and welfare.