{"id":8391,"date":"2025-03-16T08:30:41","date_gmt":"2025-03-16T06:30:41","guid":{"rendered":"https:\/\/medilab.km.ua\/?p=8391"},"modified":"2026-04-20T18:54:35","modified_gmt":"2026-04-20T15:54:35","slug":"blood-test-for-allergies-types-of-tests-preparation-and-interpretation-of-results","status":"publish","type":"post","link":"https:\/\/medilab.km.ua\/en\/blood-test-for-allergies-types-of-tests-preparation-and-interpretation-of-results\/","title":{"rendered":"Allergy blood test: types of tests, preparation and interpretation of results"},"content":{"rendered":"
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\n 4.8\/5 - (1632 votes) <\/div>\n <\/div>\n

What is an allergy blood test and why is it needed?<\/strong><\/h2>\n

An allergy is a reaction of the immune system to certain substances that are usually safe for most people. Symptoms can range from mild (runny nose, itching, rash) to severe (anaphylactic shock). To identify the cause of an allergic reaction, special laboratory blood tests are used to determine the level of immunoglobulins and specific allergens in the blood.<\/p>\n

According to an allergist Oleksandra Hrytsenko<\/strong>,
\u201cAllergy blood testing is an important diagnostic tool, especially for patients who cannot undergo skin testing. It allows the identification of potential allergy triggers without the risk of worsening symptoms.\u201d<\/em><\/p>\n

Allergy blood testing is a safe diagnostic method that can be performed regardless of the patient's age. It is especially useful for children, people with skin diseases, or those who have contraindications to skin allergy testing.<\/p>\n

Types of blood tests for allergies<\/strong><\/a><\/h2>\n
\n\n\n\n\n\n\n\n\n
Type of test<\/strong><\/th>\nWhat determines<\/strong><\/th>\nWhen used<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Complete blood count<\/a> (ZAK)<\/strong><\/td>\nThe level of eosinophils \u2013 cells responsible for allergic reactions<\/td>\nPrimary analysis for suspected allergy<\/td>\n<\/tr>\n
Level analysis total IgE<\/a><\/strong><\/td>\nImmunoglobulin E concentration, which increases with allergies<\/td>\nDiagnosis of allergy susceptibility<\/td>\n<\/tr>\n
Specific IgE to allergens<\/strong><\/a><\/td>\nDetermines the body's reaction to specific allergens (food, pollen, household)<\/td>\nIdentification of a specific allergen<\/td>\n<\/tr>\n
Immunoblotting<\/strong><\/td>\nComprehensive analysis that determines the reaction to allergen groups<\/td>\nAdvanced diagnostics of allergic reactions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"Allergy<\/h2>\n

Practical example<\/strong><\/h3>\n

A 28-year-old patient consulted a doctor because of frequent runny nose and itching in the eyes, which worsened in the spring. An analysis was performed on specific IgE<\/strong>, who showed high sensitivity to pollen allergens (in particular, ragweed and birch). Thanks to the precise identification of the allergen, the doctor was able to select the appropriate therapy, which significantly improved the patient's quality of life during the flowering season.<\/p>\n

How is a blood test for allergies performed?<\/strong><\/h2>\n

The analysis involves taking venous blood in a laboratory setting. The basic principle of the test is to determine the level of antibodies IgE<\/strong> to certain allergens, which allows to identify the patient's individual sensitivity.<\/p>\n

According to an immunologist Kateryna Litvinenko<\/strong>,
\u201cUnlike skin tests, blood testing does not require direct contact with the allergen, making it safe for patients with severe allergies or at risk of anaphylaxis.\u201d<\/em><\/p>\n

The procedure takes a few minutes and does not require the body to come into contact with a potential allergen, making this method safe for people with severe allergic reactions.<\/p>\n

What allergens can be detected with a blood test?<\/strong><\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Allergen group<\/strong><\/th>\nExamples<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Food allergens<\/strong><\/td>\nMilk, eggs, nuts, fish, wheat, soy, honey<\/td>\n<\/tr>\n
Pollen allergens<\/strong><\/td>\nBirch, ragweed, wormwood, grasses<\/td>\n<\/tr>\n
Household allergens<\/strong><\/td>\nHouse dust, mites, mold<\/td>\n<\/tr>\n
Animal allergens<\/strong><\/td>\nFur of cats, dogs, rodents, bird feathers<\/td>\n<\/tr>\n
Drug allergens<\/strong><\/td>\nAntibiotics, painkillers<\/td>\n<\/tr>\n
Insect allergens<\/strong><\/td>\nVenom of wasps, bees, ants<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

How to prepare for an allergy blood test<\/strong><\/h2>\n

To ensure that the test results are as accurate as possible, you must follow several rules:<\/p>\n

    \n
  • Donate blood on an empty stomach<\/strong> \u2013 do not eat for at least 8 hours before the procedure.<\/li>\n
  • Do not use antihistamines.<\/strong> before testing (in consultation with a doctor).<\/li>\n
  • Avoid stress and physical exertion<\/strong> the day before the analysis.<\/li>\n
  • Do not drink alcohol and coffee.<\/strong> 24 hours before the procedure.<\/li>\n
  • Do not smoke before the test.<\/strong>, as this may affect immunoglobulin levels.<\/li>\n<\/ul>\n

    How to interpret the results<\/strong><\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    IgE level (kIU\/L)<\/strong><\/th>\nProbability of allergy<\/strong><\/th>\n<\/tr>\n<\/thead>\n
    Less than 0.35<\/strong><\/td>\nNo allergies<\/td>\n<\/tr>\n
    0,35-0,7<\/strong><\/td>\nLow probability<\/td>\n<\/tr>\n
    0,7-3,5<\/strong><\/td>\nModerate reaction<\/td>\n<\/tr>\n
    3,5-17,5<\/strong><\/td>\nHigh response<\/td>\n<\/tr>\n
    17,5-50<\/strong><\/td>\nVery high response<\/td>\n<\/tr>\n
    50-100<\/strong><\/td>\nSevere allergy<\/td>\n<\/tr>\n
    More than 100<\/strong><\/td>\nExtremely high response<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    According to the doctor of medical sciences Svitlana Koval<\/strong>,
    \u201cAn elevated IgE level alone is not sufficient to diagnose an allergy. It is important to consider clinical symptoms and, in some cases, additionally perform skin prick tests or provocation tests.\u201d<\/em><\/p>\n

    Benefits of allergy blood testing<\/strong><\/h2>\n
      \n
    • Safety<\/strong> \u2013 no contact with allergens during the test.<\/li>\n
    • Precision<\/strong> \u2013 the ability to determine the level of sensitivity to specific allergens.<\/li>\n
    • Applicability at any age<\/strong> \u2013 suitable for children and people at increased risk of anaphylactic reactions.<\/li>\n
    • Possibility of detecting hidden allergies<\/strong> \u2013 the analysis allows you to diagnose even latent forms of allergic reactions.<\/li>\n<\/ul>\n

      Blood allergy testing is one of the most informative diagnostic methods, allowing you to determine the causes of allergic reactions and choose the optimal treatment methods. Thanks to this test, you can identify allergens in a timely manner and avoid serious complications associated with the body's immune reactions.<\/p>","protected":false},"excerpt":{"rendered":"

      What is an allergy blood test and why is it needed? 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