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Allergic Reactions

Allergic Reactions

Allergic Reactions: Anaphylaxis

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),...

Drug Toxicity: Allergic Reactions

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...

Allergic Drug Reactions

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...

Hypersensitivities

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...

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Related Experiment Video

Updated: Jun 7, 2026

Application of Biochip Microfluidic Technology to Detect Serum Allergen-specific Immunoglobulin E (sIgE)

Application of Biochip Microfluidic Technology to Detect Serum Allergen-specific Immunoglobulin E (sIgE)

Published on: April 21, 2019

[Inappropriate test methods in allergy].

J Kleine-Tebbe¹, D A Herold

¹Allergie- u. Asthma-Zentrum Westend, Praxis Hanf, Herold & Kleine-Tebbe, Spandauer Damm 130, Haus 9, 14050, Berlin. kleine-tebbe@allergie-experten.de

Der Hautarzt; Zeitschrift Fur Dermatologie, Venerologie, Und Verwandte Gebiete

|October 22, 2010

Summary

This summary is machine-generated.

Many allergy diagnostic tests lack scientific validity and reproducibility. Misinterpretation of some tests leads to unnecessary dietary restrictions, impacting quality of life and nutrition.

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Last Updated: Jun 7, 2026

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Published on: April 21, 2019

Basophil Activation Test for Allergy Diagnosis

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Published on: May 31, 2021

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Published on: March 3, 2023

Area of Science:

Immunology
Allergy Diagnostics

Context:

Inappropriate allergy diagnostic methods are prevalent.
These include tests with obscure theoretical bases and those with misleading interpretations of valid data.

Purpose:

To critically analyze and comment on unqualified allergy diagnostic tests.
To highlight the lack of validity and reproducibility in certain methods.

Summary:

Category I tests (bioresonance, ALCAT-test) lack theoretical basis, validity, and reproducibility.
Category II tests (IgG/IgG4 antibodies, lymphocyte proliferation) show misleading interpretations, causing false positives and unjustified diets.
Lymphocyte proliferation tests, while sometimes elevated in allergies, lack diagnostic specificity for individual hypersensitivity.

Impact:

Unqualified tests lead to unjustified dietary restrictions, potentially causing malnutrition and reduced quality of life.
Widespread use is fueled by marketing and media, necessitating critical evaluation by scientific societies.