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Allergy test

Allergy test

M320/0307

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Credit

DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY

Caption

Allergy test. Arm of a patient undergoing a skin prick allergy test. This test is used to identify substances (allergens) that cause an allergic reaction in the patient. Small amounts of suspected allergy-causing substances are placed on the skin, then the skin is pricked with the tip of a scalpel blade (as seen here) in order to introduce them under its surface. The skin is then observed for signs of a reaction, which usually develop within several minutes. These include redness and swelling.

Release details

Model release available. Property release not required.

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