【Detection principle】 The product uses fluorescent immunochromatography to quantitatively detect FeLV content in cat serum/plasma. Basic principle: Lines T and C are drawn on the nitrocellulose membrane, and the line T is marked with antibody A that specifically recognizes the FeLV antigen. Anti-B labeled with another fluorescent nanomaterial that can specifically recognize FeLV is sprayed on the binding pad. The FeLV in the sample is first combined with the nanomaterial-labeled antibody B to form a complex, and then chromatographically upward, the complex and T-line antibody a combine to form a sandwich structure, when the excitation light is irradiated, the nanomaterial emits a fluorescent signal, and the signal intensity is the same as that of the sample There was a positive correlation with the concentration of FeLV in . Therefore, reliable and effective detection has a positive guiding role in prevention, diagnosis and treatment.