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• Immunology Terms

- R -

• Radioallergosorbent test (RAST)

A solid-phase radioimmunoassay for detecting IgE antibody specific for a particular allergen.



• Radioimmunoassay (RIA)

A widely used technique for measurement of primary antigen-antibody interactions, and for the determination of the level of important biological substances in mixed samples. It takes advantage of the specificity of the antigen-antibody interaction and the sensitivity that derives from measurement of radioactively labelled materials.



• Reagin

Allergist's term for IgE antibodies.



• Respiratory burst

Oxygen dependent increase in metabolic activity within phagocytic cells stimulated by bacteria or parasites, to be microbicidal.



• Reticuloendothelial system

A network of phagocytic cells.



• Rheumatoid factor

An autoantibody (usually IgM) which reacts with the individual's own IgG. Present in rheumatoid arthritis.