Used in immunological research to detect and quantify duck immunoglobulin A (IgA) in biological samples such as serum, plasma, or mucosal secretions. This kit is particularly useful in avian immunology studies, helping researchers assess immune responses in ducks, especially in the context of infectious diseases, vaccine development, and mucosal immunity. It enables high-throughput analysis in poultry health monitoring and supports studies on gut and respiratory immunity where IgA plays a key role in defense mechanisms. The assay is commonly applied in veterinary research, zoonotic disease investigations, andavian influenza (avian influenza) surveillance programs.