A new immunoperoxidase assay for Lolium perenne‐specltic IgE in serum based on the biotin/avidin system (BAS)

Abstract
A new solid-phase immunoassay based on the biotin/avidin system (BAS) for measuring serum L. perenne (LP)-specific IgE antibody is described. LP-specific IgE was assayed by the BAS assay and RAST [radioallergosorbent test] for comparison in the sera of 32 normal asymptomatic [human] subjects RAST-negative for LP and of 26 subjects with hay fever and RAST-positive for LP. The specificity of the BAS assay for LP-specific IgE was demonstrated by absorption experiments. An overall agreement of 91% (53/58) was observed between the BAS and RAST; a high correlation (r = 0.87, P < 0.001) was found between the LP-specific IgE determined by the 2 methods. The advantages of the BAS assay as compared to the RAST and classical ELISA [enzyme-linked immunosorbent assay] are discussed.

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