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Related Concept Videos

Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

91
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...
91
Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

111
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,...
111
Hypersensitivities01:30

Hypersensitivities

8.1K
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 Drug Reactions01:27

Allergic Drug Reactions

1.6K
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...
1.6K
Allergic Reactions02:06

Allergic Reactions

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Overview
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Skin Diseases and Disorders01:23

Skin Diseases and Disorders

6.0K
Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
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Related Experiment Video

Updated: Mar 16, 2026

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

A Mouse Ear Model for Allergic Contact Dermatitis Evaluation

Published on: March 24, 2023

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Allergic Dermatoses.

Van Nguyen1, Lauren Simon1, Ecler Jaqua1

  • 1Department of Family Medicine, Loma Linda University, 25455 Barton Road, Suite 209B, Loma Linda, CA 92354, USA.

Primary Care
|August 23, 2016
PubMed
Summary
This summary is machine-generated.

This review covers atopic dermatitis, contact dermatitis, urticaria, and angioedema, detailing their clinical presentation, diagnosis, and management. Understanding differences is key for effective treatment and prognosis.

Keywords:
AngioedemaAtopic dermatitisContact dermatitisEczemaUrticaria

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Area of Science:

  • Dermatology
  • Clinical Medicine

Background:

  • Atopic dermatitis and contact dermatitis share similarities but have distinct etiologies impacting patient quality of life.
  • Urticaria and angioedema, while related, require precise differentiation due to potential for significant morbidity and mortality.

Purpose of the Study:

  • To review current literature on atopic dermatitis, contact dermatitis, urticaria, and angioedema.
  • To focus on the clinical presentation, diagnosis, and management of these four dermatological conditions.

Main Methods:

  • Literature review of available scientific material.
  • Synthesis of information on clinical features, diagnostic criteria, and therapeutic strategies.

Main Results:

  • Detailed comparison of atopic and contact dermatitis, highlighting differing developmental pathways.
  • Emphasis on distinguishing urticaria from angioedema for accurate prognosis and management.

Conclusions:

  • Effective management of these conditions relies on accurate diagnosis and understanding of their unique characteristics.
  • Differentiating between similar dermatological conditions is critical for patient outcomes and prognosis.