Rabbit CXCL13 (C-X-C motif chemokine ligand 13), also known as BCA-1 (B-cell–attracting chemokine 1), is a homeostatic chemokine belonging to the CXC chemokine family that plays a central role in B-cell migration and organization of lymphoid tissues. In rabbits (Oryctolagus cuniculus), CXCL13 is produced primarily by follicular dendritic cells, stromal cells, and macrophages within secondary lymphoid organs, including the lymph nodes, spleen, and mucosal-associated lymphoid tissues. CXCL13 signals through the chemokine receptor CXCR5, which is expressed on B lymphocytes and T follicular helper (Tfh) cells, directing their migration into lymphoid follicles and germinal centers where antibody-producing B cells develop and undergo affinity maturation. In rabbit immunity, CXCL13 contributes to germinal center formation, B-cell homing, and development of humoral immune responses during infection and vaccination. Rabbits are widely used as animal models for immunology and antibody production, and CXCL13-mediated B-cell trafficking is important for understanding germinal center responses and antibody maturation in studies involving vaccine development and infectious disease research.