Used in immunological research to quantify rat interleukin-5 (IL-5) levels in biological samples such as serum, plasma, or cell culture supernatants. This ELISA kit enables researchers to study the role of IL-5 in eosinophil activation and differentiation, particularly in models of allergic inflammation, asthma, and parasitic infections. It is a valuable tool for assessing immune responses in preclinical studies involving rats, helping to evaluate therapeutic interventions targeting the IL-5 pathway. The assay provides high sensitivity and specificity, allowing for accurate measurement of IL-5 concentrations in small sample volumes.