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Related Concept Videos

Allergic Reactions02:06

Allergic Reactions

33.3K
Overview
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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
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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Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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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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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 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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Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

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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...
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A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma
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Sports-Aggravated Allergies.

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    Many individuals with asthma and allergies experience symptoms aggravated by sports. Treatment involves managing exercise-induced allergic reactions by avoiding triggers or using medication.

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    Area of Science:

    • Allergy and Immunology
    • Sports Medicine
    • Pulmonology

    Background:

    • Asthma and allergic conditions are prevalent, affecting many individuals.
    • Sports participation can trigger or worsen allergic symptoms due to allergens and environmental factors.
    • Athletes with allergies face both positive and negative impacts from physical activity.

    Purpose of the Study:

    • To review the effects of sports participation on individuals with allergic conditions.
    • To discuss the management strategies for exercise-induced allergic symptoms.

    Main Methods:

    • Literature review on allergy, asthma, and sports.
    • Analysis of factors influencing allergic responses during exercise.
    • Overview of treatment approaches for exercise-aggravated allergies.

    Main Results:

    • Sports can elicit beneficial and detrimental allergic responses.
    • Specific allergens and non-specific factors impact symptom presentation.
    • Management requires identifying and mitigating exercise-related triggers.

    Conclusions:

    • Effective management of sports-triggered allergies is crucial for athletes.
    • Treatment strategies include allergen avoidance and pharmacologic interventions.
    • Modifying exercise or environment can improve outcomes for allergy patients.