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Related Concept Videos

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...
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),...
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...
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...
Allergic Reactions02:06

Allergic Reactions

Overview
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: May 14, 2026

A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
08:02

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[Cutaneous allergy in construction workers].

F Rui1, M Bovenzi, A Prodi

  • 1UCO Medicina del Lavoro - Università degli Studi di Trieste, Trieste, Italy. frui@units.it

Giornale Italiano Di Medicina Del Lavoro Ed Ergonomia
|February 15, 2013
PubMed
Summary
This summary is machine-generated.

Building trade workers show higher risks for allergic contact dermatitis due to chromium, epoxy resin, and thiuram mix sensitization. Effective prevention measures are crucial for this occupational group.

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Area of Science:

  • Occupational dermatology
  • Toxicology
  • Epidemiology

Context:

  • Allergic contact dermatitis (ACD) poses a significant health concern for various occupational groups.
  • Building trade workers are frequently exposed to a range of potential allergens in their work environment.

Purpose:

  • To investigate the association between specific occupations, particularly building trades, and sensitization to common allergens identified through patch testing.
  • To quantify the risk of sensitization to chromium, epoxy resin, and thiuram mix among construction workers compared to office workers.

Summary:

  • A study involving 900 building trade workers and 4372 office workers assessed patch test results for suspected allergic dermatitis.
  • Multivariate logistic regression revealed significant associations between building trade work and sensitization to chromium (OR 1.55), epoxy resin (OR 3.80), and thiuram mix (OR 1.69).
  • Chromium is a known occupational hapten in this group, while epoxy resin is widely used in construction, and thiuram mix is found in rubber gloves.

Impact:

  • The findings highlight the elevated risk of specific sensitizations in the construction industry, underscoring the need for targeted preventive strategies.
  • Implementing effective measures to reduce exposure to these allergens is essential for mitigating allergic contact dermatitis in building trade workers.