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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

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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...
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Allergic Reactions: Anaphylaxis01:30

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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,...
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Allergic Reactions02:06

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Allergic Drug Reactions01:27

Allergic Drug Reactions

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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...
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Hypersensitivities01:30

Hypersensitivities

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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.
Types of Hypersensitivities
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Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

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Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...
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Related Experiment Video

Updated: Mar 17, 2026

A Mouse Ear Model for Allergic Contact Dermatitis Evaluation
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Allergic Contact Dermatitis.

A A Fisher

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    |July 21, 2016
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    Summary
    This summary is machine-generated.

    Allergic contact dermatitis in athletes can stem from sports equipment or topical analgesics, causing itchy rashes. Diagnosis is clinical, and management involves avoiding allergens and treating the skin reaction.

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    Area of Science:

    • Dermatology
    • Allergology
    • Sports Medicine

    Background:

    • Allergic contact dermatitis (ACD) is a common skin condition.
    • Athletes may be exposed to unique allergens through sports equipment and topical treatments.
    • Identifying these allergens is crucial for managing ACD in active individuals.

    Purpose of the Study:

    • To outline the causes and presentation of allergic contact dermatitis in athletes.
    • To describe the diagnostic approach for ACD in this population.
    • To provide management strategies for ACD related to sports activities.

    Main Methods:

    • Clinical diagnosis based on patient history and physical examination.
    • Identification of common allergens in sports equipment (e.g., rubber, metals, dyes).
    • Recognition of topical analgesics as potential triggers for ACD.

    Main Results:

    • ACD in athletes typically presents as pruritus, erythema, and eczema.
    • Patch testing is often unnecessary as diagnosis is clinical.
    • Rash resolution typically occurs rapidly upon allergen removal.

    Conclusions:

    • Allergic contact dermatitis in athletes is frequently linked to sports equipment and topical analgesics.
    • A clinical diagnosis is usually sufficient, supported by the rapid improvement after allergen avoidance.
    • Management focuses on allergen identification, avoidance, and symptomatic treatment of dermatitis.