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Related Experiment Videos

Allergy testing: in vivo versus in vitro.

D R Ownby1

  • 1University of Michigan, Ann Arbor.

Pediatric Clinics of North America
|October 1, 1988
PubMed
Summary

Skin tests are the most sensitive and cost-effective method for detecting allergen-specific immunoglobulin E (IgE), crucial for diagnosing severe allergies. In vitro tests offer alternatives for specific patient cases, but proper diagnosis requires clinical correlation.

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Area of Science:

  • Allergy and Immunology
  • Diagnostic Testing
  • Immunopathology

Background:

  • Allergen-specific IgE detection is vital for diagnosing allergic diseases.
  • Both skin tests and in vitro assays have advantages and disadvantages.
  • Standardization and quality control remain challenges for both testing methods.

Purpose of the Study:

  • To compare the relative advantages and disadvantages of skin tests and in vitro tests for detecting allergen-specific IgE.
  • To highlight the current best practices and limitations in IgE testing.
  • To emphasize the importance of clinical correlation in allergy diagnosis.

Main Methods:

  • Comparative analysis of skin tests and in vitro assays for allergen-specific IgE.
  • Discussion of sensitivity, cost-efficiency, and quality control aspects.
  • Review of clinical scenarios where each test is preferred.

Main Results:

  • Skin tests are highly sensitive and cost-efficient for detecting allergen-specific IgE, especially for life-threatening allergies.
  • In vitro tests are suitable alternatives when skin testing is not feasible (e.g., skin conditions, interfering medications, high sensitivity).
  • Quality control and standardization are ongoing issues for both methods, though quality control programs are improving in vitro test reliability.

Conclusions:

  • Properly performed skin tests are currently the optimal method for detecting allergen-specific IgE due to their speed, sensitivity, and cost.
  • In vitro tests serve as valuable alternatives in specific clinical situations and for research.
  • A positive IgE test alone does not confirm allergy; diagnosis requires clinical correlation, including challenge tests and demonstration of IgE-mediated inflammation.

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