atopic allergy

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atopic allergy

A child with an atopic allergy develops a rash after touching a cat.

Definition
  1. Noun:
    • An immediate hypersensitivity reaction: A type of allergic reaction, also known as Type I hypersensitivity, mediated by immunoglobulin E (IgE) antibodies. The reaction becomes apparent in a sensitized person within minutes of contact with a specific allergen.
Usage
  • The term "atopic allergy" is used in medical and scientific contexts to describe a specific, rapid immune response to an allergen (e.g., pollen, dust mites, certain foods, animal dander) in individuals with a genetic predisposition (atopy).
  • It is a formal term. In common language, people often simply say "allergy" or specify the type, such as "hay fever" or "food allergy," which are typically atopic allergies.
Examples
  • Noun:
    • The patient's history of eczema and asthma suggests a predisposition to atopic allergy.
    • Skin prick testing is a common method for diagnosing an atopic allergy to specific substances.
    • Her severe reaction to peanuts was diagnosed as an atopic allergy.
Advanced Usage
  • "Atopic" refers to the genetic tendency to develop allergic diseases. Therefore, "atopic allergy" specifically denotes an allergy occurring in an atopic individual.
  • The reaction involves mast cells and basophils releasing histamine and other chemicals, leading to symptoms like sneezing, itching, hives, or, in severe cases, anaphylaxis.
Variants and Related Words
  • Atopy (n): The genetic predisposition to develop allergic diseases such as allergic rhinitis, asthma, and atopic dermatitis (eczema).
    • Atopy often runs in families.
  • Atopic dermatitis (n): A chronic inflammatory skin condition common in people with atopy.
    • Infantile eczema is a form of atopic dermatitis.
  • Immediate hypersensitivity (n): A technical synonym for the rapid allergic reaction characteristic of atopic allergy.
  • Type I hypersensitivity (n): The immunological classification for atopic allergy.
Synonyms
  • Immediate allergy
  • IgE-mediated allergy
Related Phrases / Idioms
  • (To have) a classic atopic triad: A phrase sometimes used in medicine to describe a patient who has three common atopic conditions: eczema, allergic rhinitis (hay fever), and asthma.
    • The child presented with the classic atopic triad.
atopic allergy

A child with an atopic allergy develops a rash after touching a cat.

Noun
  1. an allergic reaction that becomes apparent in a sensitized person only minutes after contact

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