Used for the quantitative measurement of aspartate aminotransferase (AST) enzyme activity in duck biological samples such as serum, plasma, or tissue homogenates. This ELISA kit enables researchers and veterinarians to assess liver function and detect liver damage or disease in ducks. It is commonly applied in poultry health monitoring, disease research, and evaluation of hepatotoxic effects from infections, toxins, or nutritional imbalances. The assay provides a sensitive and specific method to support diagnostic and experimental studies in avian medicine and veterinary science.