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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),...
Allergic Reactions02:06

Allergic Reactions

Overview
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...
Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...
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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Related Experiment Video

Updated: Jun 13, 2026

Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects
09:45

Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects

Published on: April 21, 2018

Hymenoptera venom allergy.

Didier G Ebo1, Margo M Hagendorens, Wim J Stevens

  • 1University of Antwerp, Department of Immunology, Allergology and Rheumatology, 2610 Antwerpen, Belgium. immuno@ua.ac.be

Expert Review of Clinical Immunology
|May 19, 2010
PubMed
Summary
This summary is machine-generated.

Hymenoptera stings can cause severe allergic reactions. Accurate diagnosis via skin testing and immunoglobulin E antibody measurement is crucial for effective venom immunotherapy, though desensitization mechanisms require further study.

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Last Updated: Jun 13, 2026

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Published on: April 21, 2018

Basophil Activation Test for Allergy Diagnosis
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10:25

Extraction of Venom and Venom Gland Microdissections from Spiders for Proteomic and Transcriptomic Analyses

Published on: November 3, 2014

Area of Science:

  • Allergy and Immunology
  • Toxicology
  • Insect Venom Research

Background:

  • Hymenoptera stings typically cause local reactions, but can trigger life-threatening anaphylaxis in allergic individuals.
  • Accurate diagnosis of venom allergy is essential for appropriate management, including specific venom immunotherapy.
  • While venom immunotherapy is effective, its underlying molecular and cellular mechanisms are not fully understood.

Purpose of the Study:

  • To highlight the importance of accurate diagnosis in managing hymenoptera sting allergies.
  • To underscore the effectiveness of venom immunotherapy.
  • To identify the knowledge gaps in the desensitization mechanisms of venom immunotherapy.

Main Methods:

  • Review of diagnostic methods for hymenoptera sting allergy, including skin testing.
  • Quantification of venom-specific immunoglobulin E antibodies.
  • Discussion of current understanding and limitations in the mechanisms of venom immunotherapy.

Main Results:

  • Diagnosis relies on skin tests and IgE antibody levels.
  • Venom immunotherapy demonstrates high efficacy in preventing severe reactions.
  • The precise molecular and cellular processes of desensitization remain largely unknown.

Conclusions:

  • Prompt and accurate diagnosis is critical for patients with hymenoptera sting allergies.
  • Specific venom immunotherapy is a highly effective treatment for venom-allergic individuals.
  • Further research is needed to elucidate the mechanisms of action for venom immunotherapy to optimize treatment strategies.