Orange IgE

The Orange IgG test is a diagnostic tool designed to measure immunoglobulin G (IgG) antibodies specific to oranges in a patient's serum. IgG antibodies are crucial for long-term immunity and can indicate sensitization to specific allergens, such as those found in citrus fruits. This test is particularly useful for individuals experiencing chronic symptoms like gastrointestinal issues or skin rashes after consuming oranges. The procedure involves drawing a blood sample, which is then processed to separate the serum. Using an enzyme immunoassay (EIA) method, the test quantifies IgG concentrations, providing results that help in diagnosing and managing food allergies. While a positive result suggests sensitization, it does not confirm an allergy, as IgG presence alone is not definitive. The test is not FDA-approved for diagnostic use, and its clinical utility is still under evaluation. Results are typically available within 3 to 7 business days, and careful interpretation by healthcare providers is essential.

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 Orange IgG test is a diagnostic tool for assessing IgG antibodies specific to oranges, aiding in food allergy management. Key points include:

- Purpose: Identifies chronic symptoms linked to orange consumption.
- Procedure: Involves blood sample collection and serum separation.
- Methodology: Uses enzyme immunoassay to measure IgG levels.
- Interpretation: Results indicate sensitization levels, from negative to extremely positive.
- Clinical Utility: Supports allergy diagnosis alongside other tests.
- Limitations: Not FDA-approved; results require careful interpretation.
- Specimen Stability: Refrigeration preferred for accurate results.

Who Should Get Tested

The Orange IgE test is essential for diagnosing orange allergies by detecting specific IgE antibodies. It helps identify allergens causing symptoms like skin rashes and respiratory issues. Key aspects include:

- Methodology: Utilizes Fluorescence Enzyme Immunoassay (FEIA) for accurate results.
- Specimen Requirements: Needs 0.3 mL serum, stored at 2-8°C for up to 14 days.
- Turnaround Time: Results in 1-3 business days.
- Interpretation: IgE levels categorized from Class 0 (negative) to Class 6 (extremely high positive).

This test aids in diagnosis, defining allergens, and confirming sensitization before immunotherapy.

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 managing food allergies effectively. The Orange IgG test measures specific IgG antibodies to oranges, aiding in diagnosis and management. Here's how to interpret the results:

- Negative Results: IgG levels below 2.0 mcg/mL suggest no sensitization to oranges.
- Positive Results: Levels above 2.0 mcg/mL indicate sensitization, with varying degrees:
- Borderline: 0.10-0.34 mcg/mL
- Equivocal: 0.35-0.69 mcg/mL
- Positive: 0.70-3.49 mcg/mL
- Strongly Positive: 3.50-17.4 mcg/mL
- Extremely Positive: >17.5 mcg/mL

These results should be interpreted alongside clinical symptoms for accurate diagnosis.

Price of test:£34

The lowest price from the last 30 days: £34

AI-Powered Insights and Expert Validation

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