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Reply to "Elimination diet and formula choice in the management of food protein-induced allergic proctocolitis (FPIAP)".

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Non-immunoglobulin E-mediated food allergy.

Victoria E Cook1, Lori A Connors2, Timothy K Vander Leek3,4

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Allergy, Asthma, and Clinical Immunology : Official Journal of the Canadian Society of Allergy and Clinical Immunology
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Non-immunoglobulin E (IgE)-mediated food allergies cause delayed gastrointestinal issues. Diagnosis and management involve clinical assessment and food avoidance, often needing multidisciplinary care.

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Area of Science:

  • Gastroenterology
  • Allergy and Immunology
  • Pediatrics

Background:

  • Non-immunoglobulin E (IgE)-mediated food allergies present with delayed gastrointestinal symptoms.
  • Conditions include food protein-induced allergic proctocolitis (FPIAP), food protein-induced enteropathy (FPE), and food protein-induced enterocolitis syndrome (FPIES).
  • These allergies are common in infants but FPIES can occur at any age.

Purpose of the Study:

  • To review the clinical manifestations, epidemiology, pathophysiology, diagnosis, management, and prognosis of non-IgE-mediated food allergies.
  • To highlight diagnostic challenges and management strategies.
  • To emphasize the spectrum of these disorders.

Main Methods:

  • Literature review of non-IgE-mediated food allergies.
  • Synthesis of information on FPIAP, FPE, and FPIES.
  • Analysis of diagnostic and management approaches.

Main Results:

  • Non-IgE-mediated food allergies have delayed GI symptoms and shared pathophysiology.
  • Diagnosis is clinical, relying on symptom improvement after food elimination.
  • Management centers on avoiding trigger foods, with potential need for allergy/immunology input.

Conclusions:

  • Non-IgE-mediated food allergies represent a spectrum of GI disorders.
  • Accurate diagnosis is challenging due to non-specific symptoms and lack of biomarkers.
  • Multidisciplinary management is key for effective treatment and avoiding excessive dietary restrictions.