RAST Testing

In RAST testing, a given allergen is bound to polydextran bead. Serum is then added and antigen-specific IgE will bind to the immobilized antigen. Radiolabeled anti IgE is then added. The amount of bead-bound radioactivity is proportional to the concentration of antigen-specific IgE in the serum.

In RAST testing, a given allergen is bound to polydextran bead. Serum is then added and antigen-specific IgE will bind to the immobilized antigen. Radiolabeled anti IgE is then added. The amount of bead-bound radioactivity is proportional to the concentration of antigen-specific IgE in the serum.