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Related Experiment Videos

[Present situation and problems in allergy testing in vitro].

M Ikeda1, T Ieiri

  • 1Department of Clinical Laboratory, Dokkyo University Hospital, Mibu, Tochigi 321-0293.

Rinsho Byori. the Japanese Journal of Clinical Pathology
|June 8, 2001
PubMed
Summary

Evaluating specific immunoglobulin E (IgE) assays reveals inconsistencies across different kits and allergens. Improvements in reagents and quality control are crucial for accurate allergy diagnostics.

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Nihon Jibiinkoka Gakkai kaiho·1992

Area of Science:

  • Allergy diagnostics
  • Immunology
  • In vitro assay development

Context:

  • Specific immunoglobulin E (IgE) testing is vital for diagnosing allergic diseases.
  • Several commercial in vitro assay kits are available for measuring specific IgE levels.
  • Variability in assay performance can impact diagnostic accuracy.

Purpose:

  • To evaluate the performance and identify limitations of commercially available in vitro specific IgE assay kits.
  • To compare the correlation coefficients of four different assay kits (CAP, AlaSTAT, MAST, QAS) across various allergens.
  • To investigate potential sources of discordance and variability in specific IgE measurements.

Summary:

  • Comparison of four commercial specific IgE assay kits (CAP, AlaSTAT, MAST, QAS) showed low correlation coefficients for allergens like common ragweed, mugwort, and fungi (Aspergillus, Candida, Alternaria).
  • Potential reasons for discordance include differences in allergen origin and extraction methods.
  • Significant between-lot variability was observed in one kit (QAS) for egg white and milk, despite low overall imprecision.

Impact:

  • Highlights the need for standardization in allergen extraction procedures and the approval of standard materials for specific IgE assays.
  • Emphasizes the importance of rigorous daily quality control by users to ensure reliable allergy test results.
  • Suggests that improvements in assay reagents and methodology are necessary to enhance the accuracy and consistency of specific IgE testing for clinical use.

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