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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

Overview
Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Allergic Drug Reactions01:27

Allergic Drug Reactions

Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing numerous...
Hypersensitivities01:30

Hypersensitivities

Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
Conditioned Taste Aversion01:14

Conditioned Taste Aversion

Conditioned taste aversion, also known as sauce béarnaise syndrome, is a phenomenon in which an individual develops an aversion to a certain food taste following a negative experience, typically illness. This form of aversion is a type of classical conditioning in which the taste of the food (conditioned stimulus, CS) is associated with the experience of illness (unconditioned stimulus, UCS).
A notable characteristic of conditioned taste aversion is that it often requires only a single exposure...

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Related Experiment Video

Updated: Jun 30, 2026

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation
04:34

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Published on: September 14, 2018

Food allergy: is strict avoidance the only answer?

C W Allen1, D E Campbell, A S Kemp

  • 1Department of Allergy and Immunology, The Children's Hospital at Westmead, Sydney, New South Wales 2145, Australia.

Pediatric Allergy and Immunology : Official Publication of the European Society of Pediatric Allergy and Immunology
|September 19, 2008
PubMed
Summary
This summary is machine-generated.

Strict food allergen avoidance may not always be best for preventing or managing IgE-mediated food allergies. Animal studies suggest tolerance can be induced by specific exposure levels, challenging traditional avoidance recommendations.

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Last Updated: Jun 30, 2026

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Area of Science:

  • Immunology
  • Allergy Research
  • Pediatric Allergy

Background:

  • Current understanding suggests food allergen avoidance reduces sensitization risk in infants and prevents reactions in children with positive skin prick tests (SPT).
  • The goal of avoidance is to promote tolerance development or at least not hinder it.
  • However, animal models indicate tolerance can be induced by high or low allergen doses, with intermediate doses potentially stimulating immune responses.

Purpose of the Study:

  • To review the immunological paradigm of food allergen exposure and avoidance.
  • To critically evaluate the efficacy of strict allergen avoidance in preventing and managing IgE-mediated food allergy.
  • To discuss alternative strategies based on dose-dependent immune responses.

Main Methods:

  • Literature review of immunological principles related to food allergy.
  • Analysis of animal studies on dose-dependent induction of tolerance.
  • Discussion of clinical recommendations versus experimental findings.

Main Results:

  • Traditional immunological paradigms suggest avoidance is beneficial.
  • Animal studies demonstrate that both high-zone and low-zone tolerance can be induced by allergen exposure.
  • Intermediate allergen doses may paradoxically stimulate immune responses rather than tolerance.

Conclusions:

  • Strict allergen avoidance may not be universally optimal for all patients with IgE-mediated food allergy.
  • The dose and timing of allergen exposure are critical factors in immune response modulation.
  • Further research is needed to refine strategies for inducing tolerance and managing food allergies.