Cranberry IgE

The Cranberry IgE test is a specialized diagnostic tool designed to identify allergic reactions to cranberries by detecting specific IgE antibodies in the serum. This test is essential for diagnosing cranberry allergies and pinpointing the allergens responsible for triggering allergic symptoms, including severe reactions like anaphylaxis. Utilizing the ImmunoCAP Fluorescence Enzyme Immunoassay (FEIA) method, the test offers high specificity and sensitivity. It involves collecting a serum sample, which is then analyzed to measure the IgE antibody levels. Results are categorized into classes ranging from negative to very high positive, indicating the likelihood of an allergic response. Proper specimen handling, including refrigeration or freezing, ensures test accuracy. While the test is a valuable tool for allergy diagnosis, results must be interpreted within the broader clinical context, considering the patient's medical history and symptoms. Developed by Mayo Clinic, the test aligns with CLIA standards, though it lacks FDA clearance.

Price of test:£39

The lowest price from the last 30 days: £39

Awaiting result:

12 hours

Collect material:

Blood

Prepare:

Learn more

Purpose of the test

The Cranberry IgE test is essential for diagnosing cranberry allergies by detecting specific IgE antibodies. This test helps identify allergens responsible for allergic reactions, including severe anaphylactic episodes. Key aspects include:

- Purpose: Indicates immune response to cranberry allergens.
- Procedure: Serum sample collection, centrifugation, and analysis.
- Specimen Handling: Refrigeration preferred; freezing extends stability.
- Methodology: ImmunoCAP FEIA measures specific IgE levels.
- Interpretation: IgE levels categorized into classes indicating allergy severity.

Results must be interpreted in clinical context, considering patient history and symptoms for accurate diagnosis and treatment.

Who Should Get Tested

The Cranberry IgE test is essential for diagnosing cranberry allergies, identifying allergens responsible for allergic reactions, and assessing the risk of anaphylactic episodes. Key aspects include:

- Purpose: Detects specific IgE antibodies to confirm cranberry allergy.
- Procedure: Serum sample collection, centrifugation, and analysis using ImmunoCAP FEIA.
- Specimen Handling: Store refrigerated for 14 days or frozen for 90 days.
- Interpretation: IgE levels categorized from Class 0 (Negative) to Class 6 (Very High Positive).
- Clinical Considerations: Results must be interpreted with clinical context to avoid false positives.

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 treatment. The Cranberry IgE test identifies specific IgE antibodies to determine cranberry allergies. Here's how to interpret the results:

- Class 0: <0.10 kU/L - Negative
- Class 0/1: 0.10-0.34 kU/L - Equivocal
- Class 1: 0.35-0.69 kU/L - Low Positive
- Class 2: 0.70-3.49 kU/L - Moderate Positive
- Class 3: 3.50-17.49 kU/L - High Positive
- Class 4-6: >17.50 kU/L - Very High Positive

Consider clinical context and history for accurate interpretation.

Price of test:£39

The lowest price from the last 30 days: £39

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