type IV allergic reaction
- noun
- /taɪp fɔr əˈlɜrdʒɪk ˌriˈækʃən/
- Specialized
:
reacción alérgica tipo IV
- The rash she developed was due to a type IV allergic reaction to nickel in her jewelry.
Examples
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Doctors diagnosed his skin inflammation as a type IV allergic reaction after patch testing.
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A type IV allergic reaction typically emerges 24 to 72 hours after contact with the allergen.
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A type IV allergic reaction can take hours to develop.
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Many patients experience a type IV allergic reaction after exposure.
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A type IV allergic reaction typically emerges 24 to 72 hours after contact with the allergen.
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Doctors diagnosed his skin inflammation as a type IV allergic reaction after patch testing.
-
The rash she developed was due to a type IV allergic reaction to nickel in her jewelry.
Synonyms
36
3.0
The body has a strong unwanted response to things like pollen or peanuts and causes swelling, sneezing and difficulty breathing
A reaction that appears hours after contact with something you are allergic to
An extreme response by the immune system to something you are allergic to that can be life threatening
Surface Forms
Morphology
type + IV + allergic + reaction
The expression transparently labels a class of allergic reaction (type + IV + allergic + reaction), so a learner who knows the constituent words can infer it is a particular numbered kind of allergy. However, the specific clinical sense of 'type IV' (a delayed, cell‑mediated rather than antibody‑mediated response) is technical and cannot be derived from the words alone, requiring domain knowledge.
Etymology
Type IV allergic reaction comes from a medical system that numbers different kinds of allergy; the label type IV, meaning 'four', is a reminder that this is the slow, late kind. It means the body's special immune cells make a 'delayed' reaction that appears hours or days after contact, not the quick antibody response.