【Detection principle】 The product uses fluorescence immunochromatography to quantitatively detect the FIV Ab content in cat serum/plasma. Basic principle: T and C lines are drawn on the nitrocellulose membrane, and the T line is marked with a secondary antibody that specifically recognizes cat IgG . Antigens labeled with fluorescent nanomaterials that can specifically recognize FIV Ab are sprayed on the binding pad . The FIV Ab in the sample first combines with the antigen labeled by the nanomaterial to form a complex, and then goes up the chromatography. The complex is captured by the T-line antibody . When the excitation light is irradiated, the nanomaterial emits a fluorescent signal, and the signal intensity is the same as that of the FIV in the sample. Ab concentration was positively correlated.