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Allergocomponent diagnostics: how to identify the true allergen with molecular accuracy
Allergy is one of the most common diseases of the 21st century. It affects millions of people around the world, manifesting itself in various ways: from the common cold to anaphylaxis. However, classical diagnostic methods do not always allow us to accurately determine the true cause of an allergic reaction. This is where allergocomponent diagnostics comes to the rescue - an innovative approach that allows us not only to identify the allergen, but also to understand, What protein fraction does the body react to?.
What is allergy component diagnostics?
This is a modern method of laboratory diagnostics, based on the detection of specific IgE antibodies to individual protein components of an allergen. Unlike traditional tests, which show a general reaction to a product or substance (for example, pollen or milk), component diagnostics allows you to determine, which protein from this allergen causes symptoms. This is critically important because a single allergen can contain dozens of proteins, and not all of them are dangerous for a particular person.
How the method works
The method is based on the analysis of a venous blood sample. In the laboratory, the presence of IgE antibodies to various protein molecules is determined using the enzyme-linked immunosorbent assay or microarray method. As a result, the patient receives not just the answer «is there an allergy» or «is there not», but a complete profile of sensitivity to various components.
For example, a person may not be allergic to all milk proteins, but only to casein. In this case, consuming fermented foods (yogurt, cheese) may be safe.
Who is recommended to undergo
Patients with suspected complex or polyvalent allergy
For those who have conflicting results from classic allergy tests
People with severe allergic reactions (including anaphylaxis)
For children who are planning to introduce complementary foods or change their diet
Before starting allergen-specific immunotherapy (ASIT)
People with seasonal allergies to find out if there is a cross-reaction with foods
Examples of common components
| Allergen | Component | Diagnostic value |
|---|---|---|
| Birch | Bet v 1 | The main protein that causes true allergies |
| Peanut | Ara h 2 | High risk indicator for anaphylaxis |
| Milk | Bos d 8 (casein) | Can cause severe allergies even after heating |
| Cat | Fel d 1 | The main allergen to which 90% allergy sufferers are sensitive |
| Apple | Mal d 1 | Cross-reactivity in patients with birch pollen allergy |
What does allergy component diagnostics give?
Accurate diagnostics: allows you to distinguish between true allergies and cross-sensitivity or intolerance
Risk assessment: allows you to predict the severity of the reaction (mild discomfort or threat of anaphylaxis)
Personalized treatment: helps to select immunotherapy only for those components that cause symptoms
Fewer restrictions in life: allows you to keep foods in your diet if it turns out that there is no reaction to the dangerous protein
Safe diet planning for a child: allows you to avoid unnecessary restrictions and ensure complete nutrition
How is the examination carried out?
Consultation with an allergist is being conducted.
Venous blood is donated (on an empty stomach or after a light breakfast)
The sample is sent to a specialized laboratory
A few days later, the patient receives a detailed report with a list of components and the IgE level to each.
The allergist interprets the results and develops a plan of action: dietary changes, observation, or therapy
What is the difference from the standard one? IgE analysis
The classic IgE test only allows us to see the fact of sensitization to an allergen. But it does not show which protein the body is reacting to, and therefore does not allow us to accurately assess the risks. For example, a positive test for peanuts does not necessarily mean that there will be anaphylaxis. Only the presence of specific antibodies to the Ara h 2 protein indicates a high risk of a severe reaction.
Advantages and disadvantages
Advantages
high-precision diagnostics
reducing the number of false positive reactions
useful for patients with many allergies
the ability to predict the risk of anaphylaxis
reliable base for ASIT
Disadvantages
higher cost than classic tests
requires professional interpretation
not always necessary for mild forms of allergies
Allergocomponent diagnostics opens up new possibilities in allergy management — not avoiding everything in a row, but knowing exactly what is truly dangerous and what is completely safe for you or your child. That is why this method is becoming the basis of modern allergology.
