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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. Skin allergy test - Wikipedia

   en.wikipedia.org/wiki/Skin_allergy_test

   Patch test: applying a patch to the skin, where the patch contains the allergen; If an immuno-response is seen in the form of a rash, urticaria , or anaphylaxis it can be concluded that the patient has a hypersensitivity (or allergy) to that allergen. Further testing can be done to identify the particular allergen. [citation needed]

4. Patch test (finite elements) - Wikipedia

   en.wikipedia.org/wiki/Patch_test_(finite_elements)

   A broader definition of patch test (applicable to any numerical method, including and beyond finite elements) is any test problem having an exact solution that can, in principle, be exactly reproduced by the numerical approximation. Therefore, a finite-element simulation that uses linear shape functions has patch tests for which the exact ...

5. Ouchterlony double immunodiffusion - Wikipedia

   en.wikipedia.org/wiki/Ouchterlony_double_immuno...

   A gel plate is cut to form a series of holes ("wells") in an agar or agarose gel. A sample extract of interest (for example human cells harvested from tonsil tissue) is placed in one well, sera or purified antibodies are placed in another well and the plate left for 48 hours to develop.

6. Iodopropynyl butylcarbamate - Wikipedia

   en.wikipedia.org/wiki/Iodopropynyl_butylcarbamate

   In every study, positive patch test reactions occurred in less than 1% of subjects tested in all but one study. This is a very low reaction rate, but it is not zero, and the industry reports this low rate of reaction even though in the largest study of 25,435 subjects over 69% of the reactions were either weak or doubtful [Warshaw et al., 2013a].

7. Skin test - Wikipedia

   en.wikipedia.org/wiki/Skin_test

   Download as PDF; Printable version; ... A skin test is a medical test in which a substance is injected into the skin. [1] ... Patch test; Schick test; Skin allergy test;

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9. Potassium dichromate - Wikipedia

   en.wikipedia.org/wiki/Potassium_dichromate

   Patch test. In 2005–06, potassium dichromate was the 11th-most-prevalent allergen in patch tests (4.8%). [12] Potassium dichromate is one of the most common causes of chromium dermatitis; [13] chromium is highly likely to induce sensitization leading to dermatitis, especially of the hand and forearms, which is chronic and difficult to treat ...