Total IgE: what it is, the norm, causes of deviations and diagnostic methods

Immunity and its relationship with allergies

Have you ever wondered why some people walk around peacefully during the flowering season, while others suffer from a constant runny nose and itchy eyes? Why can the same product be safe for one person, but cause a serious allergic reaction in another? The answer lies in the functioning of the immune system and the level of immunoglobulins, in particular IgE.

Immunoglobulin E (IgE) is a special protein that is responsible for allergic reactions and the body's immune response to certain stimuli. Elevated levels of this antibody can indicate a predisposition to allergies, asthma, or even parasitic infections. Total IgE analysis is an important tool for assessing the state of the immune system and finding the causes of unexplained symptoms.

What does the total IgE test show?

Analysis on total IgE determines the concentration of this antibody in the blood and is used to assess the level of immune activity of the body.

This test helps detect:

• Allergy susceptibility (pollen, food, medicinal, household, etc.).
• Allergic diseases, such as bronchial asthma, atopic dermatitis, rhinitis, urticaria.
• Parasitic infections, which can cause an increased immune system response.
• Autoimmune disorders, associated with uncontrolled immune processes.

When should you do a total IgE test?

The test may be useful if you experience the following symptoms:

• Chronic runny nose, watery eyes, itching in the nose and eyes without obvious infection.
• Frequent skin rashes, redness and itching.
• A reaction to certain foods, accompanied by nausea, abdominal pain, or diarrhea.
• Attacks of suffocation, wheezing, coughing after contact with allergens.
• Suspicion of parasitic infection (helminths, toxocara, giardia).

This test helps not only in confirming the diagnosis, but also in monitoring the effectiveness of treatment for allergic and immune disorders.

The norm of total IgE in the blood

IgE levels vary depending on age, so its levels may differ in children and adults.

A significant excess of the norm may indicate chronic allergic reactions, infectious or immune disorders.

Causes of elevated IgE levels

If IgE levels are significantly higher than normal, this may indicate the following conditions:

• Allergic reactions (food, household, medicinal, hay fever, asthma).
• Atopic dermatitis – a chronic inflammatory skin disease associated with an immune reaction.
• Parasitic infections – Helminths can cause an enhanced immune response.
• Chronic infections – prolonged infection of the body with bacteria or viruses.
• Genetic disorders – some immunodeficiency states are accompanied by elevated levels of IgE.

Causes of low IgE levels

Although decreased IgE levels occur less frequently, they may be associated with the following conditions:

• Primary immunodeficiencies – genetic diseases that affect the functioning of the immune system.
• Some cancers – for example, lymphomas can disrupt the synthesis of immunoglobulins.
• Taking immunosuppressants or corticosteroids, which reduce the activity of the immune system.

How to properly prepare for a total IgE test

To obtain accurate results, you should follow these rules:

• 2-3 days before the test exclude spicy, fatty foods, alcohol and possible allergens from the diet.
• Do not take antihistamines. before the test (unless your doctor recommends otherwise).
• Take the test on an empty stomach – the last meal should be at least 8 hours before the test.
• Do not smoke before the test., as this may affect the level of antibodies in the blood.

Determining the level of total IgE is an important test for diagnosing allergies, immune disorders, and parasitic infections. Regular monitoring of this indicator allows you to avoid complications and adjust treatment in a timely manner.