The use of antibodies to identify and quantify (measure) substances by a variety of methods. The binding of antibodies to antigen (substance being measured) is often followed by tracers, such as fluorescence or (radioactive) radioisotopes, to enable measurement of the substance.
A process for measuring an organic chemical by inducing an animal to develop an antibody to it.
A test for the presence and strength of antibodies.
Measurement of the amount of a protein by using an antibody that binds specifically to that protein.
Any one of several techniques for identifying and measuring chemical substances by using the specific binding interaction between an antigen and its corresponding antibodies. Immunoassays are diagnostic tools that can quantify the body’s response to infection. Immunoassay is also the technique for evaluating urine drug screens.
Procedures which measure the concentration of any antigenic material to which an antibody can be created. The amount of antigen bound to this antibody is proportional to the parent substance. Enzymes or radioactive labels are used to measure the concentration of antigenic material.
Any of several laboratory techniques that detect or measure molecules involved in immunological reactions.
A set of laboratory techniques, including radioimmunoassay and ELISA (enzyme-linked immunosorbent assay), is utilized for diagnosing infectious diseases, confirming immunity, and investigating allergies. These tests aim to identify the presence or absence of specific antigens (proteins found on the surface of microorganisms or allergens) or antibodies (proteins produced by the immune system to fight against particular microorganisms or allergens). Immunoassay procedures can also be employed to measure hormone levels in the blood, as hormones are also proteins.