【Detection principle】 This product uses fluorescent immunochromatographic method to quantitatively detect the CDV content in the eye, nose and mouth secretions of dogs. Basic principle: T and C lines are marked on the nitrocellulose membrane, and the T line is coated with an antibody A that specifically recognizes the CDV antigen. The binding pad is sprayed with another fluorescent nanomaterial-labeled antibody B capable of specifically recognizing CDV. The CDV in the sample is first combined with the nanomaterial-labeled antibody B to form a complex, and then chromatographically upwards, the complex and T-line antibody A Combined to form a sandwich structure, when the excitation light is irradiated, the nanomaterial emits a fluorescent signal, and the strength of the signal is positively related to the CDV concentration in the sample.