Radioallergosorbent (RAST) test A blood test that measures specific antigen IgE levels in the serum.

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Presentation transcript:

Radioallergosorbent (RAST) test A blood test that measures specific antigen IgE levels in the serum.

RAST test mechanism Taken from – Wide L. (1973). Clinical significance of measurement of reagenic (IgE) antibody by RAST. Clinical Allergy. 3. pp

Level of radioactivity is directly correlated with the level of IgE antibodies to that paritcular antigen

Performing the test

Results Results are reported in arbitrary units and divided into classes predicting the allergic reaction RAST ratingIgE level (kU/L) 0< 0.35Undetectable level of IgE Low level Moderate level High level Very high level Very high level 6> 100.0Extremely high level