These methods have a real craze since fifteen years. Their safety, speed of the answers they provide, the possibility of multiplying them, make a precious auxiliary of allergic Diagnostics.
What are they?
The tests have to interest to simulate visibly, on the skin, the conflict generated by the allergic sensitization within the body.The tests come as a result of the clinical investigation by the practitioner. If sometimes the diagnostic orientation is evoked by the simple Clinic: hay typical fever, asthma to animal dander or dust mites, food urticaria or medicated, in many cases several factors to varix and complicate the process. Increasingly, physicians are faced this type of situation and must refine their diagnosis.
The most commonly applied tests to the cabinet of the practitioner are patches (patch tests) and epidermal tests (prick-tests).
They are used to search for the contact allergies as well as that of some food allergies. They consist of the implementation of a series of stamps coated with the substance suspected cause of allergy at different concentrations, or several substances tested at the same time. These stamps are affixed to the patient’s skin and left in place a few hours or a few days. The goal is to obtain a local effect similar to the dominant symptom of the patient.
A very large number of professional eczema as well are explained. Potassium dichromate of cements (Masons), solvents and chemical dyes (various industries), materials as various as shampoos or lacquer (hairdressers) paint (body), etc.Allergy to latex, rare but very annoying, is thus easily highlighted.
The child can benefit from this technique from the youngest age, for contact dermatitis: products of toiletries, detergents and fabric softeners, soaps but also in case of eczema of food origin. A number of aggressive agents are thus unmasked: the milk, but also egg white, some vegetables, food dyes. The increasing complexity of certain foods as mixtures of exotic fruits, the introduction of dyes, fixers, gelling agents and others makes this often delicate type of diagnosis. Can we think that the introduction in the body of genetically modified proteins will help to thicken even more certain mysteries?