Walnut IgE

The walnut IgG test is a diagnostic tool designed to detect immunoglobulin G (IgG) antibodies specific to walnuts in a patient's serum. This test helps identify whether a patient has developed an immune response to walnuts, which may indicate sensitization or a potential allergy. It is often used alongside other tests, such as the walnut IgE test, to provide a comprehensive view of the patient's immune reaction. The test involves collecting a blood sample, which is then analyzed using techniques like enzyme-linked immunosorbent assay (ELISA) to measure IgG antibody levels. Results are reported in micrograms per milliliter, with levels above the reference range suggesting sensitization. However, a positive IgG result does not confirm an allergy, as IgG antibodies indicate sensitization rather than an allergic reaction. The test is valuable for assessing sensitization but should be interpreted alongside other diagnostic findings to accurately diagnose and manage potential walnut allergies.

Price of test:£34

The lowest price from the last 30 days: £34

Awaiting result:

One day

Collect material:

Blood

Prepare:

Learn more

Purpose of the test

The walnut IgG test evaluates the presence of IgG antibodies specific to walnut in a patient's serum, aiding in the assessment of potential sensitization or allergy. Key aspects include:

- Sample Collection: Blood is drawn, serum separated, and analyzed.
- Laboratory Analysis: Techniques like ELISA detect walnut-specific IgG.
- Result Interpretation: Levels above 2.00 mcg/mL suggest sensitization.

Clinical significance involves distinguishing sensitization from allergy, considering cross-reactivity, and using results alongside other tests for accurate diagnosis. Understanding these factors is crucial for managing potential walnut allergies effectively.

Who Should Get Tested

The Walnut IgE test is essential for diagnosing walnut allergies, which can be severe. It measures specific IgE antibodies in the serum using a Fluorescent Enzyme Immunoassay (FEIA) method. Key points include:

- Purpose: Diagnoses walnut allergy, confirms sensitization, and investigates cross-reactivity.
- Methodology: Measures IgE levels using allergen extracts.
- Interpretation: Positive results suggest sensitization; negative results don't exclude allergy.
- Clinical Significance: Walnut allergy can cause severe reactions, prevalent in children.
- Cross-Reactivity: Walnut shows cross-reactivity with pecan and other nuts.
- Management: Avoid walnuts; molecular diagnostics aid in management.

Blood Test Preparation Guidelines

Time of day

It is recommended to schedule your appointment for blood tests in the morning hours between 7:00-10:00.

Fasting

It is recommended to fast for approximately 12 hours before blood sampling. The last meal of the previous day should ideally be consumed around 6:00 p.m. On the day before the test, avoid heavy and fatty meals as well as alcohol.

Stay hydrated

Drinking water prior to testing can help with sample collection.

Other factors

Tests should not be performed after a sleepless night or intense physical activity. It is recommended to avoid exercise and stress immediately before blood collection and to not smoke. A short rest is recommended.

Medications and supplements:

Blood samples should be collected before the morning dose. Some drugs can interfere with test results. Consult with your doctor whether you can delay your dose because of lab tests.

Biotin supplements:

High doses of biotin supplements can affect test results, causing false elevation or reduction. It's recommended to avoid taking biotin for at least 72 hours before blood collection. If you are taking biotin, inform the personnel collecting the blood so that they can provide specific instructions.

Interpreting Test Results

Understanding test results is crucial for accurate diagnosis and management. The walnut IgG test helps identify immunologic sensitization to walnut, but it doesn't confirm an allergy alone. Here's a breakdown:

- Purpose: Detects IgG antibodies to assess immune response to walnut.
- Sample Collection: Blood sample analyzed for IgG antibodies.
- Results Interpretation: Levels above 2.00 mcg/mL suggest sensitization.
- Clinical Significance:
- Sensitization vs. Allergy: IgG indicates sensitization, not allergy.
- Cross-Reactivity: Possible with other nuts and plants.
- Diagnostic Utility: Used with other tests for comprehensive diagnosis.
- False Positives: Can occur due to nonspecific binding.

Understanding these aspects aids in informed healthcare decisions.

Price of test:£34

The lowest price from the last 30 days: £34

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