Allergy, Onion Test: Booking, Price, and Results
About Allergy, Onion Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Onion IgE test, onion f48 IgE, onion- specific IgE, allium cepa IgE test |
| Sample Type | Serum (blood) |
| Fasting Required | No fasting required |
| Report Time | 3 days |
| Recommended For | All ages, males and females with suspected onion allergy |
| Price | Starting at ₹1,300 |
What Is an Allergy, Onion Test?
The allergy, onion test is a blood test that checks whether your immune system reacts to onion proteins. It measures specific IgE (immunoglobulin E) antibodies produced when the body mistakes onion proteins for a harmful substance. It is also called the onion IgE test or the allium cepa IgE test. Doctors order this test when a patient reports symptoms after eating or handling onions. A small blood sample drawn from a vein is all that is needed.
What Does an Allergy, Onion Test Measure?
The test measures one key marker in your blood. Here is what it looks for:
| Parameter | What Measures |
|---|---|
| Onion-specific IgE antibodies | Whether your immune system produces antibodies against onion proteins, indicating sensitisation or allergy. |
The result is reported in kU/L (kilounits per litre) and classified into grades (0 to 6) based on the antibody level detected. This grading helps your doctor understand the degree of sensitisation to onion.
Why Is an Allergy, Onion Test Done?
Your doctor may recommend the allergy, onion test when symptoms suggest a possible reaction to onions. The test helps confirm a true IgE-mediated allergy rather than a food intolerance.
Common Symptoms That May Require This Test
The following symptoms often prompt a doctor to order this test:
- Skin itching, hives, or rashes after eating or touching onions.
- Swelling of the lips, tongue, or face.
- Digestive discomfort such as nausea or stomach cramps.
- Runny nose, watery eyes, or sneezing.
- Difficulty breathing or wheezing
- Skin inflammation after handling raw onions.
- Generalised allergic reactions of unclear cause.
Conditions This Test Can Help Detect
This test can help identify the following conditions:
- True IgE-mediated onion allergy, distinct from food sensitivity or intolerance.
- Allergic reactions from onion handling, including contact dermatitis, rhinoconjunctivitis, or occupational asthma.
- Cross-reactivity with other allium family vegetables such as garlic, leeks, chives, and shallots.
- Rare but serious reactions, including anaphylaxis, in individuals with high sensitisation.
How to Prepare and What to Expect
Preparation for the allergy, onion test is straightforward. No fasting or special diet changes are needed before your appointment.
Do You Need to Fast?
No. Fasting is not required for this test. You can eat and drink normally before your sample is collected.
Practical Tips Before Your Test
Keep these points in mind before going for your test:
- Bring a detailed clinical history including your symptoms, previous test results, and relevant medical records, as this is required for the test.
- Inform your doctor or the phlebotomist about all medications you are currently taking, particularly antihistamines or immunosuppressive drugs.
- Mention any supplements you take, as some may affect the result.
- Drink water as usual; staying hydrated makes the blood draw easier.
- Wear a short-sleeved or loose-sleeved top for easy access to the arm.
Step-by-Step Procedure
Here is what happens during the allergy, onion test procedure:
- A trained phlebotomist will clean the skin over a vein in your arm with an antiseptic wipe.
- A small needle is used to draw approximately 3 mL of blood into a sterile collection tube.
- You may feel a brief sting; the process takes under two minutes.
- Once the blood is collected, the needle is removed and gentle pressure is applied to the site.
- A small bandage is placed over the area to prevent any minor bleeding.
- The sealed sample is stored under refrigeration and sent to the laboratory for fluorescent enzyme immunoassay (FEIA) analysis.
Factors That Can Affect Accuracy
Certain factors may influence the accuracy of your result:
- Very high total IgE levels (above 2,500 kU/L) can cause false-positive readings.
- Use of immunosuppressive medications.
- Active parasitic infections, which can raise overall IgE levels.
- Smoking, which may elevate total IgE in the blood.
- Poor sample storage or handling before analysis.
Understanding Your Allergy, Onion Test Results
Your result will show the level of onion-specific IgE antibodies in your blood, classified by grade. Always discuss your result with your doctor before drawing any conclusions.
| Class | IgE level (kU/L) | Interpretation |
|---|---|---|
| 0 | Less than 0.35 | Negative (no detectable sensitisation) |
| 1 | 0.35 to 0.69 | Low positive (low-level sensitisation) |
| 2 | 0.70 to 3.49 | Moderate positive |
| 3 | 3.50 to 17.4 | High positive |
| 4 | 17.5 to 49.9 | Very high positive |
| 5 | 50 to 100 | Very high positive |
| 6 | Greater than 100 | Very high positive |
Levels of 0.70 kU/L or above (class 2 and higher) are considered abnormally elevated.
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
Some conditions can affect how your results should be read:
- Patients with markedly elevated total IgE (above 2,500 kU/L) may show false-positive results due to nonspecific binding.
- A positive IgE result does not indicate how severe a reaction will be. The level of IgE present does not correlate with the severity of an allergic reaction.
- Elevated IgE may also occur due to smoking or a parasitic infection, so your doctor will consider your full clinical picture.
How to Maintain Healthy Levels
These general tips support your wellbeing if on onion allergy is confirmed:
- Avoid onions and onion-containing foods; read food labels carefully, as onion may be listed under terms like "spices" or "natural flavourings".
- Inform restaurants and food preparers about your allergy when eating out.
- Follow your doctor's guidance on managing allergic reactions; do not self-medicate.
Lupin Diagnostics Allergy, Onion Test Price and Home Collection
The allergy, onion test is available at Lupin Diagnostics starting at ₹1,300, with home sample collection offered for your convenience.
| 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, onion test home collection across cities in India, making it easy to get tested without visiting a centre. All samples are processed in NABL-accredited laboratories by experienced professionals. Your digital report is delivered directly to your email or WhatsApp.
How to Book
Booking your allergy, onion test online is simple:
- 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
The allergy, onion test is a blood test that checks for IgE antibodies specific to onion proteins. When your immune system is sensitised to onions, it produces these antibodies. Measuring them helps your doctor confirm whether your symptoms are caused by a true onion allergy.
An allergy involves the immune system producing IgE antibodies and can cause reactions ranging from hives to, in rare cases, anaphylaxis. Onion intolerance is a digestive response with no immune system involvement. The allergy, onion test specifically identifies immune-mediated allergy, not intolerance.
Unlike skin prick tests, antihistamines do not affect IgE levels measured in a blood test. However, tell your doctor about all medications you are taking so they can interpret your results accurately.
No fasting is needed. You can eat and drink normally before the test. The only preparation required is bringing your clinical history and informing the phlebotomist about your current medications.
Onions and garlic belong to the same allium family, so cross-reactivity is possible. Studies suggest this occurs in roughly 20 to 30% of cases. If you suspect a garlic allergy as well, your doctor may recommend separate testing for garlic-specific IgE.
In rare cases, a severe onion allergy can trigger anaphylaxis. This is uncommon but has been documented. If you experience sudden swelling, difficulty breathing, or a drop in blood pressure after eating onions, seek medical attention promptly.
At Lupin Diagnostics, your report is typically ready within 3 days of sample collection. You will receive it digitally via email or WhatsApp.
Allergy, Onion Test: Booking, Price, and Results
