| A | B |
|---|
| Direct agglutination | antigen is naturally occurring on cells |
| Direct hemagglutination | antigen is naturally found on RBCs |
| Passive agglutination | particles are caoted with antigens not normally found there |
| Reverse passive agglutination | particles are coated with reagent antibody |
| Coagglutination | bacteria are used as carrier particles |
| Agglutination inhibition | lack of agglutination is a positive result indicating the presence of patient antigen |
| Hemagglutination inhibition | RBCs spontaneously agglutinate in the presence of certain viruses and the lack of agglutination indicates the presence of patient antibody |
| Direct agglutination, direct hemagglutination, passive agglutination and hemagglutination inhibition | In these agglutination assays a positive result indicates the presence of patient antibody |
| Reverse passive agglutination, coagglutination and agglutination inhibition | In these agglutination assays a positive result indicates the presence of patient antigen |
| Direct antiglobulin test (DAT) | detects in vivo bound antibody |
| Indirect antiglobulin tes (IAT) | detects in vitro bound antibody |
| Sensitization stage | antibody binds to antigen |
| Lattice formation | antibody crosslinks antigens to form visible clumps |
