Used in immunological research to quantify secreted immunoglobulin A (sIgA) levels in mouse biological samples such as serum, saliva, fecal extracts, and mucosal secretions. Enables assessment of mucosal immune responses in studies related to infectious diseases, gut health, vaccine efficacy, and autoimmune conditions. Commonly applied in preclinical studies involving mouse models to evaluate the impact of probiotics, pathogens, or therapeutic interventions on mucosal immunity. The kit provides a reliable and sensitive method for high-throughput screening in immunology and biomedical research.