Casein IgG

The cashew nut IgE test is a diagnostic tool designed to assess potential allergies to cashew nuts by measuring Immunoglobulin E (IgE) antibodies in a patient's serum. Initially, the test evaluates total cashew-specific IgE levels. If these levels are below 0.10 kU/L, the test concludes. However, if levels are 0.10 kU/L or higher, further testing is conducted to detect IgE antibodies against Ana o 3, a significant allergenic protein in cashews. Utilizing the Fluorescent Enzyme Immunoassay (FEIA) method, the test requires a serum sample, which is processed and analyzed for IgE concentration. Results are categorized from negative to extremely strongly positive, aiding in the diagnosis and management of cashew allergies. While the test is crucial for identifying potential allergic reactions, it must be interpreted alongside clinical history due to possible cross-reactivity and false positives. Proper specimen handling and timely reporting ensure accurate results, supporting effective allergy management.

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 cashew nut IgE test is essential for diagnosing cashew nut allergies by measuring IgE antibodies in the serum. Key steps include:

- Sample Collection: Serum is collected, centrifuged, and aliquoted.
- Testing Algorithm: Initial total IgE testing; further testing for Ana o 3 if levels are ≥0.10 kU/L.
- Result Interpretation: IgE levels categorized from negative to extremely strongly positive.

Clinical significance involves understanding allergenic potential, cross-reactivity, and test limitations. Accurate diagnosis requires correlating results with clinical history. Proper specimen handling and timely reporting are crucial for effective allergy management.

Who Should Get Tested

The cashew nut IgE test is essential for diagnosing cashew nut allergies. It measures Immunoglobulin E (IgE) levels in the serum to assess allergic reactions. Here's a brief overview:

- Sample Collection: Serum is collected, centrifuged, and aliquoted for testing.
- Testing Algorithm: Initial testing for total IgE; further testing if levels are 0.10 kU/L or higher.
- Result Interpretation: Ranges from negative to extremely strongly positive.
- Clinical Significance: Identifies potential allergenic reactions, especially to Ana o 3.
- Limitations: False positives possible; clinical correlation needed.
- Practical Considerations: Proper specimen handling and timely reporting are crucial.

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 cashew nut allergies effectively. Here's a concise guide:

- Negative Result: IgE levels below 0.10 kU/L indicate no significant allergy.
- Borderline/Equivocal: Levels between 0.10-0.69 kU/L suggest possible sensitization; further clinical evaluation is needed.
- Positive Result: Levels from 0.70 kU/L and above confirm sensitization, with higher values indicating stronger allergic potential.
- Clinical Correlation: Always consider patient history and symptoms alongside test results for accurate diagnosis.
- Limitations: Be aware of potential false positives, especially in patients with high total IgE levels.

Price of test:£34

The lowest price from the last 30 days: £34

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