Used in immunological research to detect and quantify secretory IgA antibodies from bovine sources in biological samples such as milk, saliva, or intestinal fluids. This ELISA kit enables researchers to study mucosal immune responses in cattle, supporting work in veterinary immunology, dairy health, and vaccine development. It is particularly valuable in monitoring immune status during infections, evaluating colostrum quality, and assessing gut health in livestock. The assay provides a sensitive and specific means to measure sIgA levels, aiding in the understanding of passive immunity transfer and host defense mechanisms at mucosal surfaces.