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Related Concept Videos

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),...
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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...
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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...
Hypersensitivities01:30

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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.
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Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...

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Related Experiment Video

Updated: Jun 3, 2026

Antigenic Liposomes for Generation of Disease-specific Antibodies
10:31

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Published on: October 25, 2018

Peanut allergy.

Jonathan O'B Hourihane1

  • 1Department of Paediatrics and Child Health, Clinical Investigations Unit, Cork University Hospital, University College Cork, Wilton, Cork, Ireland. J.Hourihane@ucc.ie

Pediatric Clinics of North America
|April 2, 2011
PubMed
Summary

Peanut allergy is a common childhood condition, often linked to other allergies and severe reactions. Current management focuses on avoidance, with oral tolerance induction still under development for widespread use.

Area of Science:

  • Pediatric Allergy and Immunology
  • Clinical Immunology

Background:

  • Peanut allergy affects up to 2% of children, representing a significant public health concern.
  • It is a key indicator of a severe atopic phenotype, frequently co-occurring with other allergic conditions.
  • Peanut allergy disproportionately contributes to fatal food-related allergic reactions.

Purpose of the Study:

  • To summarize the prevalence and impact of peanut allergy in childhood.
  • To highlight the challenges faced by families in managing peanut allergy.
  • To discuss the current status of oral induction of tolerance as a therapeutic strategy.

Main Methods:

  • Literature review and synthesis of existing data on peanut allergy prevalence.
  • Analysis of the association between peanut allergy and other atopic conditions.

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  • Evaluation of current management strategies and emerging therapies.

    • Main Results:

    • Peanut allergy is highly prevalent in pediatric populations.
    • Children with peanut allergy commonly exhibit other allergic diseases.
    • Stringent avoidance measures pose significant challenges for affected families.

    Conclusions:

    • Peanut allergy is a major childhood allergic condition with broad atopic implications.
    • Effective management requires strict avoidance, which can be burdensome.
    • Oral induction of tolerance shows promise but is not yet ready for routine clinical application.