IgE FAST inhibition: a rapid technique for the standardization of pollen allergen extract potency.

: An IgE FAST(TM) inhibition protocol has been developed as a rapid in vitro method for determining relative potencies of in vivo allergenic extracts. Results are obtained within one day and correlate well with those of the RAST inhibition protocol (r = .96), making the FAST assay a preferable procedure for inprocess potency determination during the manufacture of standardized allergenic extracts.