Answer:
Agglutination reactions are used to detect antibodies for relatively large pathogens, such as bacteria. For these tests, the antigen is mixed with the test sample at various dilutions. Reaction mixes are then monitored for the formation of visible aggregates.
Step-by-step explanation:
Agglutination is the process that forms clumps of particles or cells. Agglutination reactions are used to detect antibodies or bacterias by mixing in a sample an antibody with antigens. The antibody binds the antigens creating an aggregate of bacterias.