The invention discloses a single-molecule joint detection method for Alzheimer's
disease markers A beta 1-42, A beta 1-40 and P-Tau181, which comprises the following steps: 1, activating microspheres, and
coupling the activated microspheres with antibodies to prepare fluorescent
microsphere labeled antibodies, the fluorescent
microsphere labeled antibodies comprise microspheres labeled with A beta 1-42 detection antibodies, microspheres labeled with A beta 1-40 detection antibodies, and microspheres labeled with P-Tau181 detection antibodies; 2, preparing a coated
antibody immobilization plate, wherein the coated
antibody immobilization plate is coated with an A beta 1-42
capture antibody, an A beta 1-40
capture antibody and a P-Tau181
capture antibody; and 3, adding a sample containing A [beta] 1-42, A [beta] 1-40 and P-Tau, a
quality control product or a calibration product into the plate coated with the
antibody for immobilization, adding the fluorescent
microsphere labeled antibody into the plate, detecting by using a digital
fluorescence immunoassay instrument, and quantifying the content of A [beta] 1-42, A [beta] 1-40 and P-Tau by analyzing the number of fluorescent particles and matching with a
standard curve. According to the kit, the digital
fluorescence immunoadsorption technology is adopted, and the three markers A [beta] 1-42, A [beta] 1-40 and P-Tau181 are combined for detection, so that the kit has important clinical values on early diagnosis of AD,
risk stratification of diseases and timely
symptomatic treatment and prognosis judgment of patients.