Used in immunological research to quantify levels of complement component C3a in biological samples, particularly in studies related to inflammation, immune response activation, and autoimmune diseases. Enables researchers to assess complement system activity in experimental models involving bovine serum or plasma. Commonly applied in veterinary research, vaccine development, and evaluation of inflammatory pathways in bovine health, including mastitis and other infectious conditions. Provides a reliable, sensitive method for detecting C3a concentration changes during disease progression or therapeutic intervention.