Allergy, Castor Bean Test
About Allergy, Castor Bean Test
| Field | Value |
|---|---|
| Also Known As | Castor Bean Specific IgE Test, Ricinus communis IgE, k71 Castor Bean IgE, CB1A Allergy Test |
| Sample Type | Serum (blood) |
| Fasting Required | No fasting required |
| Report Time | 3 Days |
| Recommended For | All genders and ages, particularly people working in castor oil mills, agriculture, coffee processing, fertiliser handling, and felt industries |
| Price | Starting at ₹1,300 |
What Is an Allergy, Castor Bean Test?
The Allergy, Castor Bean Test is a blood test that measures specific IgE antibodies (proteins your immune system produces in response to allergens) to castor bean (Ricinus communis) proteins. A doctor may order it when a patient shows signs of an allergic reaction that could be linked to castor bean exposure. It is also known as the Castor Bean Specific IgE Test or k71 Castor Bean IgE test. A small serum sample is all that is needed.
What Does an Allergy, Castor Bean Test Measure?
This test detects IgE antibodies directed against castor bean allergens in your blood. The three main allergens it identifies are described below.
| Allergen | Description |
|---|---|
| 2S Storage Albumin (Ric c I) | The most significant castor bean allergen, detected in up to 96% of sensitised patients |
| 11S Crystalloid Proteins (Ric c II) | A major seed protein that triggers IgE responses in sensitised individuals |
| Allergen 3 (Protein Doublet) | A third distinct protein fraction associated with castor bean allergy |
Results are reported in kU/L and given a class grade (0 to 6) to indicate the degree of sensitisation.
Why Is an Allergy, Castor Bean Test Done?
This test is used when a doctor suspects that a person's allergic symptoms are linked to castor bean exposure, either through work, environment, or direct contact.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to order this test:
- Hives (urticaria) or skin redness after contact with castor bean products
- Difficulty breathing or shortness of breath
- Swelling of the lips, throat, or face (angioedema)
- Runny nose, sneezing, or eye irritation (oculorhinitis)
- Wheezing or asthma-like symptoms, particularly in occupational settings
- Rapid heartbeat or a drop in blood pressure
- Drowsiness or general unease following potential castor bean exposure
Conditions This Test Can Help Detect
Your doctor may use this test to investigate several conditions:
- Castor bean allergy, especially in workers at oil mills, docks, or agricultural facilities
- Occupational asthma caused by inhaling castor bean dust
- Contact urticaria (skin reactions from direct contact)
- Anaphylaxis linked to castor bean exposure
- Pollinosis (allergic nasal symptoms triggered by castor bean pollen)
How to Prepare and What to Expect
No complex preparation is needed for this test. The steps below will help you know what to bring and what will happen on the day.
Do You Need to Fast?
No fasting is required. You can eat and drink as normal before your Allergy, Castor Bean Test. There are no dietary restrictions to follow.
Practical Tips Before Your Test
A few simple steps will help ensure a smooth experience:
- Bring a detailed clinical history including your symptoms, previous test results, and any known allergies, as this is required for the test
- Inform your doctor about all medications you are taking, including antihistamines
- If your doctor advises it, avoid antihistamines for at least three days before the test, as they may affect results
- Stay well hydrated before your appointment to make the blood draw easier
- Continue all other medications unless your doctor specifically tells you otherwise
Step-by-Step Procedure
Here is what to expect during your castor bean allergy test appointment:
- A trained phlebotomist will check your details and confirm the test to be performed
- A suitable vein, usually in your arm, is identified and the area is cleaned with an antiseptic
- A small blood sample of approximately 3 ml is drawn using a sterile needle
- The sample is collected in a yellow-top SST gel tube and stored under refrigeration (2 to 8°C) for transport
- In the laboratory, serum is separated from the blood sample and tested using the FEIA (Fluorescence Enzyme Immunoassay) method to detect castor bean-specific IgE antibodies
- Results are reported in kU/L with a class grade and dispatched within the turnaround time
Factors That Can Affect Accuracy
Several factors may influence your test result:
- Not providing a complete clinical history, which is required for accurate interpretation
- Use of antihistamines or immunosuppressive medications before the test
- Markedly elevated total serum IgE levels (above 2,500 kU/L), which can occasionally cause false-positive readings
- Timing of the test relative to allergen exposure
- Cross-reactivity with related allergens such as green coffee bean or certain food proteins
Understanding Your Allergy, Castor Bean Test Results
Your results show the level of castor bean-specific IgE antibodies in your blood, expressed in kU/L.
The table below shows how results are graded:
| Class | kU/L Range | Interpretation |
|---|---|---|
| 0 | Less than 0.35 | Negative; no sensitisation detected |
| 1 | 0.35 to 0.69 | Low or equivocal: borderline result |
| 2 | 0.70 to 3.50 | Low level of sensitisation; often low likelihood of clinical reaction |
| 3 | 3.51 to 17.50 | Moderate sensitisation |
| 4 | Greater than 17.50 | High sensitisation; seen in a majority of castor bean-allergic patients |
| 5 to 6 | Higher values | Very high sensitisation; generally correlates with IgE-mediated clinical reactions |
Disclaimer: These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations may affect how your results are read:
- Cross-reactivity with Putranjiva roxburghii (Indian amulet tree) pollen has been reported, as this tree belongs to the same plant family as castor bean and is a common pollen source in India.
- Cross-reactivity with green coffee bean antigens also exists, though they are considered distinct allergens.
- Additionally, the principal castor bean allergen (Ric c I) may cross-react with proteins found in wheat, soybean, peanut, and certain other foods and environmental substances.
How to Maintain Healthy Levels
If your test indicates sensitisation, the following general steps may help reduce exposure:
- Avoid direct contact with castor bean products, including fertilisers that contain castor bean meal
- If you work in an oil mill, coffee processing unit, or similar setting, use appropriate respiratory protective equipment
- Be aware that sacks previously used to carry castor beans may retain allergens and cause reactions even when repurposed for other goods
Allergy, Castor Bean Test Price and Home Collection
The Allergy, Castor Bean test cost at Lupin Diagnostics starts at ₹1,300, and home sample collection is available across cities in India.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 1300 |
| CHENNAI | 1300 |
| HYDERABAD | 1300 |
| KOLKATA | 1300 |
| NAVI MUMBAI | 1300 |
| PUNE | 1300 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
Home Collection
Lupin Diagnostics offers Allergy, Castor Bean test home collection across multiple cities in India. All samples are processed in NABL-accredited laboratories by trained professionals. Your digital report is delivered securely via email or WhatsApp, so you can share it with your doctor without delay.
How to Book
Booking your Allergy, Castor Bean test online at Lupin Diagnostics is straightforward:
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred time slot
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre
- Receive your report via email or WhatsApp within the stipulated turnaround time
Frequently Asked Questions
This test checks whether your immune system produces IgE antibodies in response to castor bean proteins. A positive result helps a doctor identify castor bean as a likely trigger for your allergic symptoms. It is particularly useful for people in occupational settings with known castor bean exposure.
People who work in castor oil mills, agricultural facilities, docks, coffee-roasting units, or the felt industry are at higher risk of castor bean allergies. The test is also relevant for anyone living near castor oil processing plants who experiences unexplained respiratory or skin symptoms.
Because castor beans contain toxic compounds, skin testing is not considered safe for this allergen. A blood test to measure specific IgE antibodies is the recommended and safer method for diagnosing castor bean allergy.
No, fasting is not required. You can eat and drink as usual before the test. However, do bring a detailed clinical history to your appointment, as this is needed for accurate result interpretation.
Yes. People living near castor oil mills have developed sensitisation from airborne allergens. There are also reports of sensitisation in workers handling goods stored in sacks previously used for castor beans, even though those workers had no direct contact with the plant itself.
Results from the Allergy, Castor Bean Test are typically ready within 3 days of sample collection at Lupin Diagnostics. You will receive your report digitally once it is available.
Yes. If your total IgE level is very high (above 2,500 kU/L), there is a small chance of a false-positive reading. Cross-reactivity with related allergens such as certain tree pollens, green coffee beans, and some food proteins may also influence how your doctor interprets the result. Always share your full medical history with your doctor when reviewing results.
Allergy, Castor Bean Test
