immediate allergy
Học thuậtThân thiện
Definition
Noun: An immediate allergy is a type of allergic reaction where symptoms appear rapidly, typically within minutes, after a sensitized individual is exposed to an allergen.
Usage
The term is used in medical and clinical contexts to describe rapid-onset hypersensitivity reactions, distinguishing them from delayed reactions which may take hours or days to manifest.
Examples
- The patient's immediate allergy to peanuts required carrying an epinephrine auto-injector at all times.
- Skin prick tests are often used to diagnose immediate allergy to pollen or pet dander.
- Symptoms of an immediate allergy can include hives, swelling, and difficulty breathing.
Advanced Usage
- Pathophysiological Context: An immediate allergy is typically a Type I hypersensitivity reaction mediated by immunoglobulin E (IgE) antibodies.
- Clinical Management: The term is central to treatment protocols that emphasize rapid intervention, such as the use of antihistamines or epinephrine.
Variants and Related Words
- Immediate hypersensitivity: A more technical synonym often used interchangeably in immunology.
- Anaphylaxis: A severe, life-threatening form of immediate allergic reaction.
- Delayed allergy: The contrasting term for a slower allergic response (e.g., Type IV hypersensitivity).
Synonyms
- Acute allergy
- IgE-mediated allergy
- Type I hypersensitivity
Related Phrases
- Immediate allergic response: Emphasizes the reaction itself rather than the condition.
- Immediate-type allergy: An alternative phrasing with the same meaning.
Notes
This is a compound noun. The adjective "immediate" specifically modifies the type of "allergy" to indicate its rapid onset. The term is primarily used in technical writing and healthcare communication.
Noun
- an allergic reaction that becomes apparent in a sensitized person only minutes after contact