type IV hypersensitivity


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type IV hypersensitivity

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These materials can produce type IV hypersensitivity reactions.
A positive reaction, indicating type IV hypersensitivity, is defined as a SI greater than 3 and an equivocal reaction is a SI between 2 and 3.
The long duration of skin contact and the high concentration of PPD (up to 16%) dramatically increase the risk of contact dermatitis, Reactions are typically type IV hypersensitivity presenting as pustular dermatitis, eczemarous and vesicular dermatitis, lichenoid reaction, or generalized dermatitis.
The most common are the Type I and Type IV hypersensitivity reactions.
10] Currently, researchers believe that latex allergy manifests as a Type 1, IgE-mediated,[11,14-19] and/or Type IV hypersensitivity reaction.
Reactions such as irritation, type IV hypersensitivity from chemicals found in the natural rubber latex (NRL) gloves, as well as type I hypersensitivity to NRL protein allergens are commonly documented averse reactions to the NRL powder gloves.