| abstract |
A first buffer fluid containing a first bead having fixed to a surface thereof a first antibody that specifically binds to a first antigen is injected into a reaction container, and then a plurality of a second bead having fixed to a surface thereof a second antibody that specifically binds to an optional second antigen, and a biological sample containing an exosome to be analyzed having the first antigen and the second antigen on a surface of the exosome are injected into the reaction container, thereby generating a second buffer fluid (S1 to S3). An exosome having the first bead and the second bead bound thereto is collected from the second buffer fluid (S4). The exosome having the first bead and the second bead bound thereto is separated into the first bead, the second bead, and the exosome, and the second bead and the exosome are individually collected (S5 and S6). An inclusion of the exosome is analyzed (S7), and the number of second beads is counted (S8). |