Immunoassay tests utilize antibodies and enzymes to detect substances indirectly, while direct tests detect substances without involving antibodies.
Immunoassay tests and tests that test for a substance directly differ in their approach to detecting the presence of a substance in a solution. Immunoassays involve using antibodies conjugated to enzymes to bind to target antigens, resulting in the production of an observable end product, such as a color change. On the other hand, tests that directly test for a substance typically detect the substance itself without the intermediary step of antibody-antigen interactions.
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