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Related Experiment Video

Updated: Jun 25, 2025

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma
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Allergen Component Testing: Key in Diagnosing Atypical Pollen-Food Allergy Syndrome.

Melvin Lee Qiyu1, Tom Dawson1, Phoebe Moulsdale1

  • 1Pediatrics, Worcestershire Acute Hospitals NHS Trust, Worcester, GBR.

Cureus
|May 23, 2024
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Summary
This summary is machine-generated.

Pollen-food allergen syndrome (PFAS) can present complexly in teenagers. Allergen component testing is key for diagnosing atypical PFAS cases and personalizing management, improving patient outcomes.

Keywords:
allergen component testingfood allergiesknowledge of allergic rhinitispollen allergiespollen-food allergy syndrome

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Area of Science:

  • Immunology
  • Allergology
  • Clinical Medicine

Background:

  • Pollen-food allergen syndrome (PFAS), previously oral allergy syndrome, involves IgE-mediated cross-reactivity between pollens and raw foods.
  • Prevalence in the UK is approximately 2%, with common triggers including apples, hazelnuts, and kiwifruit.

Observation:

  • A 15-year-old female with a history of asthma, allergic rhinitis, and eczema presented with throat soreness and urticaria after consuming hazelnut-containing products.
  • Diagnostic workup, including specific IgE, skin prick, and component testing, identified cross-reactivity between Bet v 1 and hazelnut allergens.

Findings:

  • Allergen component testing proved crucial in diagnosing this atypical PFAS presentation.
  • Management involved dietary modifications, allergen avoidance, and consideration of immunotherapy, leading to symptom improvement.

Implications:

  • This case highlights the diagnostic value of allergen component testing in complex PFAS cases.
  • Effective PFAS management requires multidisciplinary collaboration, patient education, and consistent follow-up.