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Related Experiment Videos

Resolution of peanut allergy: case-control study

J O Hourihane1, S A Roberts, J O Warner

  • 1Child Health, University of Southampton, Southampton SO16 6YD. J.Hourihane@ich.ucl.ac.uk

BMJ (Clinical Research Ed.)
|May 23, 1998
PubMed
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Some children with a history of peanut allergy may no longer be allergic. Food challenges can identify tolerance, and these children often have fewer other food allergies.

Area of Science:

  • Pediatric Allergy and Immunology
  • Clinical Nutrition
  • Immunology

Background:

  • Peanut allergy is a common childhood condition.
  • Distinguishing between persistent and resolved peanut allergy is crucial for management.
  • Food challenges are a key diagnostic tool.

Purpose of the Study:

  • To compare children with resolved peanut allergy to those with persistent allergy.
  • To identify clinical and immunological differences between these groups.

Main Methods:

  • A case-control study matched for age and sex.
  • Involved 30 children (15 resolved, 15 persistent peanut allergy) undergoing open peanut food challenges.
  • Measured reactions to peanut challenge and serum specific IgE levels.

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Main Results:

  • Children with resolved peanut allergy were less likely to have allergies to other foods (2/15 vs 9/15).
  • Skin prick tests showed smaller reactions in resolvers (<6 mm weal) compared to persisters (P<0.0001).
  • Serum total and peanut-specific IgE levels did not significantly differ between groups.

Conclusions:

  • Clinicians should consider food challenges for preschool children with suspected peanut allergy, as some may have developed tolerance.
  • Preschoolers whose peanut allergy is disproven by challenge exhibit less comorbidity with other food allergies.
  • Skin prick test weal size predicts peanut reactivity but not reaction severity.