Allergy testing: skin, blood, provocative


Allergy testing is the only sure way to diagnose allergies. They are the basis for reliable diagnosis and thus appropriate treatment. There are several types of allergy testing. Find out which are the best method of diagnosis for your child.

Allergies are a real scourge of our times. If your child has skin lesions, long-term symptoms of infection such as runny nose, sore throat or cough, you should examine the child for allergies. Remember that allergy undiagnosed and therefore often inadequately treated, a child carries the risk of serious health complications.

Skin allergy tests

Skin allergy tests are the most common method for diagnosing children. They are not recommended for children under 3 years of age, due to the possibility of non-specific reaction, that may prevent the result.

This method is used mainly in patients with suspected immediate-type reaction that develops within a few dozen minutes of contact with the allergen and antibody-mediated disease with class E (IgE-mediated). Allergic skin tests are useful both in the diagnosis of inhaled allergens and food. They represent a safe method, with a high degree of reliability when used together with a detailed medical history.

The most common are skin allergy tests carried out spot. They consist of skin puncture by drops earlier imposed on her allergen. It also carries out a control sample of the negative and positive by applying to the skin suitably saline and the histamine solution. Performing trial aims to verify whether there is a normal reaction of the skin and provides a reference point for interpretation of the result. The best place to audit the forearm or back, if they are not occupied by skin lesions.

Place the bite should not bleed. The results of test are recorded after 15-20 minutes from the puncture site. The result is recorded as a summary of the most common diameter appearing on the skin wheal diameter of the resulting erythema around him. Before performing the test should be discontinued in advance antihistamines because they are falsifying test results and make them unsuitable diagnostically.

Blood allergy tests

Tests carried out with the blood have many advantages. First of all, you can perform all children, regardless of age, without affecting the reliability of the result. This test comprises determining the level of specific IgE antibodies in the serum. They require the withdrawal of anti-allergic drugs which in the case of hard extending sensitization is practically impossible. This type of testing is indicated for children with AD covers the back and forearms, which prevents the execution of skin tests that must be performed on intact skin lesions. Another advantage of this type of diagnosis is the possibility of testing a child for up to 27 allergens in one blood draw.
Provocative allergy tests

Provocative allergy tests are the least frequently used method for diagnosis of allergy. They are very useful in cases of allergy IgE independent, so called. nietolerancjach food. They are also used as a method of diagnosing asthma and chronic against allergic rhinitis. These attempts are able to clearly detect bronchial hyperresponsiveness when exposed to a sensitizing substance.

In the case of diagnosing food allergy in infants and young children is carried out so-called. open rehearsal provocative. It involves the administration of potentially allergenic baby food and watching the response of the body.

In order to determine the cause of asthma and chronic rhinitis, nasal attempt to apply provocative, and therefore inhalation exposure to a potential allergen.

Because of the potential for severe allergic reactions and even anaphylactic shock, provocation best and safest way it is to be performed in a hospital.
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