From Citizendium, the Citizens' Compendium
Regarding types of substrates being tested:
- Immunoassays and serologic tests (serologic tests include agglutination tests) use blood samples
- Immunohistochemistry tests use tissue samples.
- Immunoassays such as the enzyme-linked immunosorbent assay (ELISA) and Western blot, along with the tissue immunohistochemistry fluorescent antibody technique all test the direct binding of antibody to antigen.
- Serologic tests such as agglutination tests (including hemagglutination tests and latex agglutination tests) test secondary immunoglobulin and antigen interactions.