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A synthetic food dye used in processed foods like confections, soft drinks, flavoring syrups, condiments and convenience foods in order to create a potent yellow or bright green coloring. Prevalence of allergenicity is unclear but it is the most likely azo dye to cause hypersensitivity and reactions may occur from ingestion or skin contact.
Allergic contact dermatitis is common, affecting up to 20% of all people. [5] People sensitive to one allergen are at an increased risk of being sensitive to others. [5] Family members of those with allergic contact dermatitis are at higher risk of developing it themselves. [5] Women are at higher risk of developing allergic contact dermatitis ...
Better-studied allergens nickel, cobalt and palladium bordered in red, (likely) essential trace elements in green text, non-metals in grey text. [1] Nickel allergy and allergies to mercury and chromium have long been recognised; gold, palladium, and cobalt have gotten attention more recently.
Irritant dermatitis is usually confined to the area where the irritating substance actually touched the skin, whereas allergic dermatitis may be more widespread on the skin. Irritant dermatitis is usually found on hands whereas exposed areas of skin. Symptoms of both forms include the following: Red rash: This is the usual reaction. The rash ...
Contact dermatitis is of two types: allergic (resulting from a delayed reaction to an allergen, such as poison ivy, nickel, or Balsam of Peru), [43] and irritant (resulting from direct reaction to a detergent, such as sodium lauryl sulfate, for example). Some substances act both as allergen and irritants (wet cement, for example).
Type III hypersensitivity, in the Gell and Coombs classification of allergic reactions, occurs when there is accumulation of immune complexes (antigen-antibody complexes) that have not been adequately cleared by innate immune cells, giving rise to an inflammatory response and attraction of leukocytes.
The patch is applied to the skin, usually on the back. The allergens on the patch include latex, medications, preservatives, hair dyes, fragrances, resins, and various metals. [7] Patch testing is used to detect allergic contact dermatitis but does not test for hives or food allergy. [8]
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