Egg White Allergy Test
About Egg White Allergy Test
| Field | Value |
|---|---|
| Also Known As | Egg White IgE Test, Egg White Specific IgE, Egg White Allergen Test, F1 IgE Test |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting needed |
| Report Time | 5 to 6 working days |
| Recommended For | All ages; most commonly ordered for infants and children |
| Price | Starting at ₹1,300 |
What Is an Egg White Allergy Test?
The egg white allergy test is a blood test that measures the level of Immunoglobulin E (IgE) antibodies your body produces against proteins found in egg white. IgE is an antibody the immune system makes when it mistakenly treats a harmless substance as a threat. Doctors order this test when a patient shows signs of a possible egg white allergy. It is also known as the egg white IgE test or the F1 IgE test, and it uses a small blood sample drawn from a vein in the arm.
What Does an Egg White Allergy Test Measure?
This test detects the presence and concentration of egg white-specific IgE antibodies in your blood. Egg white contains several allergenic proteins that can trigger immune reactions in sensitive individuals. The key proteins involved are listed below:
| Protein | Notes |
|---|---|
| Ovomucoid (Gal d 1) | The most clinically significant egg allergen; resistant to heat and digestion |
| Ovalbumin (Gal d 2) | One of the major egg white proteins |
| Ovotransferrin (Gal d 3) | A common allergenic component |
| Lysozyme (Gal d 4) | Found in egg white; can trigger reactions in some individuals |
| Ovomucin | A structural protein with allergenic potential |
Why Is an Egg White Allergy Test Done?
An egg white-specific IgE test is ordered when a doctor suspects that a patient's symptoms are caused by an immune reaction to egg white proteins.
Common Symptoms That May Require This Test
The following symptoms often prompt a doctor to order this test:
- Hives or a nettle-type rash on the skin
- Swelling of the lips, face, or area around the eyes
- Itching or an itchy, tingling sensation in the throat
- Nausea, vomiting, or diarrhoea after eating egg
- Runny nose and watery eyes (rhinoconjunctivitis)
- Persistent cough, wheezing, or chest tightness
- Dizziness or light-headedness following egg consumption
Conditions This Test Can Help Detect
A positive result from this test can assist in identifying several conditions:
- IgE-mediated egg white allergy
- Urticaria (hives) and angioedema (swelling beneath the skin)
- Atopic dermatitis (eczema) triggered or worsened by egg exposure
- Allergic asthma linked to egg white proteins
- Eosinophilic oesophagitis (inflammation of the food pipe related to food allergy)
- Anaphylaxis risk assessment in individuals with a history of severe reactions
How to Prepare and What to Expect
Preparation for this test is straightforward, and the collection process is quick and simple.
Do You Need to Fast?
No, fasting is not required before the egg white allergy test. You can eat and drink normally on the day of your test. However, if your doctor has ordered additional tests alongside this one, check whether any of those require fasting.
Practical Tips Before Your Test
Keep the following in mind before your appointment:
- Tell your doctor about any medicines you take, particularly antihistamines, corticosteroids, or anti-inflammatory drugs, as these may affect the result
- Wear a top or shirt with sleeves that can be rolled up easily
- Drink enough water and stay normally hydrated
- Let your doctor know about any recent allergic reactions or suspected exposures to egg
Step-by-Step Procedure
Here is what to expect during sample collection:
- A trained phlebotomist will clean a small area on your arm with an antiseptic swab
- A fine needle is inserted into a vein, usually on the inside of the elbow, to draw a few millilitres of blood
- The blood is collected into a special tube and labelled with your details
- Light pressure is applied to the puncture site; a small bandage may be placed over it
- The sample is sent to the laboratory, where it is processed to separate the serum
- The serum is tested using an immunoassay method that measures how much IgE binds to egg white allergen proteins
Factors That Can Affect Accuracy
Several factors can influence the reliability of your result:
- Very high total IgE levels in the blood (above 2,500 kU/L) may cause false-positive readings
- Recent use of antihistamines or corticosteroids
- Timing of the test relative to a recent allergic episode
- The patient's age, as IgE levels naturally vary across life stages
- Presence of other allergic conditions, such as atopic dermatitis
Understanding Your Egg White Allergy Test Results
Your results will show a specific IgE level measured in kU/L (kilounits per litre), along with a class rating. Always review your results with your doctor, who will interpret them alongside your symptoms and medical history.
| Class | IgE Level (kU/L) | Interpretation |
|---|---|---|
| Class 0/1 | 0.10 – 0.34 | Borderline/Equivocal |
| Class 1 | 0.35 to 0.69 | Equivocal |
| Class 2 | 0.70 to 3.49 | Positive |
| Class 3 | 3.50 to 17.4 | Positive |
| Class 4 | 17.50 to 49.99 | Strongly positive |
| Class 5 | 50.0 to 99.9 | Strongly positive |
| Class 6 | > or = 100 | Strongly positive |
A result below 0.35 kU/L suggests no detectable IgE-mediated sensitisation to egg white. Results at Class 2 and above (0.70 kU/L or higher) are considered abnormally elevated and indicate an increased likelihood of egg white allergy.
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 conditions can affect how results should be read:
- Patients with atopic dermatitis and other food allergies may show false-positive results, so the clinical context is essential
- Cross-reactivity is known to occur between chicken egg white and the egg whites of turkey, duck, goose, and gull, which may be relevant if you consume eggs from these birds
- A raised total IgE level alone is not enough to diagnose an allergic condition and must be assessed alongside your symptoms, age, and history
How to Maintain Healthy Levels
These general tips may be helpful:
- If an egg allergy is confirmed, avoid egg and egg-containing foods as guided by your doctor
- For children who can tolerate baked egg products such as biscuits and cakes, these foods need not be removed from the diet, as continued exposure to baked egg may help the child outgrow the allergy faster
- Speak with an allergist about whether a gradual reintroduction plan is suitable for your situation
Lupin Diagnostics Egg White Allergy Test Price and Home Collection
The egg white allergy test price at Lupin Diagnostics starts at approximately ₹1,300, with home sample collection available across major cities. The city-wise pricing guide below is based on aggregator data.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1,300 |
| Bangalore | ₹1,300 |
| Chennai | ₹1,300 |
| Hyderabad | ₹1,300 |
| Pune | ₹1,300 |
| Kolkata | ₹1,300 |
| Bhopal | ₹1,300 |
| Indore | ₹1,300 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- 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
Home Collection
Lupin Diagnostics offers home sample collection for the egg white IgE test in cities across India, making it convenient for young children and people with mobility concerns. All samples are processed in NABL-accredited laboratories to ensure accurate and reliable results. Your digital report is delivered directly to your email or WhatsApp.
Frequently Asked Questions
The egg white allergy test detects IgE antibodies in the blood that your immune system produces in response to egg white proteins. It helps doctors confirm or rule out an egg white allergy as the cause of allergic symptoms such as hives, vomiting, or breathing difficulties.
No fasting is required. You can eat and drink normally before the test. The only preparation needed is to inform your doctor about any medicines you are currently taking, particularly antihistamines or anti-inflammatory drugs.
Results for the egg white-specific IgE test are typically available within 5 to 6 working days from the date of sample collection.
Yes, many children do outgrow egg allergy. Around one third of children grow out of it by age 3, and two thirds by age 6. This is more likely in children who can tolerate baked egg products. Your doctor may recommend periodic retesting to track any changes.
Not necessarily. A raised egg white IgE level indicates sensitisation, meaning your immune system has produced antibodies against egg white proteins. However, the result must be interpreted alongside your symptoms and clinical history. Your doctor will determine whether a true allergy is present.
Yes. Patients with atopic dermatitis or other food allergies may sometimes show false-positive readings. Very high total IgE levels in the blood can also affect accuracy. Your doctor will consider these factors when reviewing your result.
Yes. The test requires only a small blood draw and is considered a safe way to investigate suspected egg allergy in young children. It avoids the need for more invasive procedures such as oral food challenges in high-risk cases.
Egg White Allergy Test
