Used to measure levels of interleukin-17 in biological samples such as serum, plasma, or cell culture supernatants. Commonly applied in immunology research to study inflammatory responses, autoimmune diseases like multiple sclerosis or rheumatoid arthritis, and host defense mechanisms. Helps evaluate T-helper 17 (Th17) cell activity in mouse models. Supports drug development and preclinical studies by providing quantitative data on cytokine expression during disease progression or treatment.