【Detection principle】 This product uses fluorescence immunochromatography to quantitatively detect the content of FCoV in cat feces. Basic principle: there are T and C lines on the nitrocellulose membrane, and the T-line is coated with antibody a which can specifically recognize FCoV antigen. Another fluorescent nanomaterial labeled antibody that can specifically recognize FCoV is sprayed on the binding pad. From B, the FCoV in the sample first combines with the antibody B labeled with the nanomaterial to form a complex. Then, the complex binds to the T-line antibody A to form a sandwich structure. When the excitation light is irradiated, the nano material emits a fluorescence signal, and the intensity of the signal is in positive phase with the concentration of FCoV.