Used in immunological research to quantify levels of Interleukin-9 in biological samples from chickens. This kit enables researchers to study the role of IL-9 in avian immune responses, particularly in T-cell activation, allergic responses, and defense against parasitic infections. It is commonly applied in poultry health studies, vaccine development, and inflammatory disease research. The assay supports high-throughput analysis in laboratories focusing on avian cytokine networks and immune system regulation.