Skin Prick Test for Food Alergens

31 May
What is a Skin Prick Test? A skin prick test, also called scratch test, checks for immediate or delayed allergic reactions to different substances called allergen.

This test is usually done to identify allergies to foods, mold, pet dander, dust mites and pollen. The skin prick test is widely used and it is the most sensitive indicator of allergen sensitivity carring very low risk of serious side effects to patients.

What is the Principle of Skin Prick Test?

skin prick testSkin prick test give information about the presence of specific IgE to allergen. Cells which react to allergens in the body by releasing histamine (Mast cells) can be found in the sub-ephithelial layer on the respiratory tract, GI tract and skin. Small amounts of allergen is introduced into the body through the skin (epidermis and non-vascular superficial dermis) and interact with specific IgE. Histamine and other mediators are released, causing swelling, redness, and itching (“wheal-and-flare” reaction), peaking after about 20 minutes.


Veronica Cavallini is our Dietitian and Nutritionist.

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