The results of a patch test on a patient's back
Numéro d’image : 11843806
| Allergy testing: the results of a patch test on the back of a patient suffering from allergic contact dermatitis. A patch test is used to discover which of a number of possible substances is responsible for a patient's allergy. Small quantities of different allergens are applied either to light scratches on the skin of the arm or back,or to undamaged skin which is then covered with adhesive tape. In common allergies the offending substance causes a patch of swelling and a typical red flare in 5 to 15 minutes. A delayed reaction may take 24 to 72 hours to develop | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / John Radcliffe Hospital |
| Taille de l’image : | 2480 px × 3579 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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