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  2. Patch test - Wikipedia

    en.wikipedia.org/wiki/Patch_test

    A patch test relies on the principle of a type IV hypersensitivity reaction.. The first step in becoming allergic is sensitization. When skin is exposed to an allergen, the antigen-presenting cells (APCs) – also known as Langerhans cell or Dermal Dendritic Cell – phagocytize the substance, break it down to smaller components and present them on their surface bound major histocompatibility ...

  3. Allergic contact dermatitis - Wikipedia

    en.wikipedia.org/wiki/Allergic_contact_dermatitis

    Chronic and/or intermittent rashes which are not readily explained by history and physical exam often will benefit from further testing. Patch test. A patch test (contact delayed hypersensitivity allergy test) [17] is a commonly used examination to determine the exact cause of an allergic contact dermatitis. According to the American Academy of ...

  4. DMDM hydantoin - Wikipedia

    en.wikipedia.org/wiki/DMDM_hydantoin

    A patch test study found that "an increase in the use of DMDM hydantoin in cosmetic products will also inevitably increase the risk of cosmetic dermatitis in consumers allergic to formaldehyde." [4] The safety of formaldehyde is a topic of ongoing concern, given the prevalence of formaldehyde and formaldehyde releasers in industrial uses ...

  5. Mazzotti reaction - Wikipedia

    en.wikipedia.org/wiki/Mazzotti_Reaction

    The drug patch is placed on the skin, and if the patient is infected with the microfilaria of O. volvulus, localized pruritus and urticaria are seen at the application site. [ citation needed ] A case of the Mazzotti reaction has been reported after presumptive treatment of schistosomiasis and strongyloidiasis with ivermectin , praziquantel and ...

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  7. MELISA - Wikipedia

    en.wikipedia.org/wiki/MELISA

    It is well-known that patch testing can cause irritative local reactions. It is generally agreed that LTT based tests like MELISA are better suited for diagnosing implant-related metals sensitivity than patch testing as the relationship between skin hypersensitivity and systemic hypersensitivity (Ständer, et al., 2017) is ill-defined.

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  9. Formaldehyde releaser - Wikipedia

    en.wikipedia.org/wiki/Formaldehyde_releaser

    A patch test study found that DMDM hydantoin in cosmetic products could increase the risk of cosmetic dermatitis. [13] Some people have a contact allergy to imidazolidinyl urea causing dermatitis. [14] Such people are often also allergic to diazolidinyl urea. In 2005–06, it was the 14th-most-prevalent allergen in patch tests (3.7%). [15]