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What is an IgE (Immunoglobulin E) Test?
The IgE (Immunoglobulin E) test is a specialized blood test used to measure the total amount of IgE antibodies in your bloodstream. While most antibodies defend against bacteria and viruses, IgE specifically reacts to allergens — external substances that trigger an immune overreaction in susceptible individuals. An IgE test is the primary diagnostic step to determine if your immune system is overreacting to environmental triggers like pollen, dust mites, pet dander, mold or certain foods, and also to detect underlying parasitic infections which significantly elevate IgE levels.
✓ No fasting required — The IgE test can be done at any time of day, with or without food. No special preparation is needed. Results are typically available within 24 hours.
The Importance of Allergy and Immune Screening
Elevated IgE levels are a hallmark of an atopic (allergic) constitution. This test is critical for several reasons:
- Identifying Allergic Predisposition — confirms if symptoms like persistent sneezing, rashes, watery eyes or nasal congestion are truly allergic in origin
- Asthma Management — high IgE levels are closely linked to allergic (extrinsic) asthma, helping doctors tailor respiratory treatment including biological therapies like omalizumab
- Detecting Parasitic Infections — IgE rises significantly during parasitic infections (worms, flukes), making it a vital screening tool in tropical settings like Kolkata
- Monitoring Skin Conditions — essential for evaluating the severity of atopic dermatitis (eczema) and chronic urticaria (hives)
- Screening for Immunodeficiency — very high IgE (above 2,000 IU/mL) can indicate rare conditions like Hyper-IgE Syndrome (Job's syndrome)
Normal IgE Reference Ranges
| Age Group | Normal Total IgE Range |
|---|---|
| Adults | Below 100 IU/mL |
| Children (above 12 years) | Below 90 IU/mL |
| Children (6–12 years) | Below 200 IU/mL |
| Children (under 6 years) | Below 60 IU/mL |
| Infants (under 1 year) | Below 15 IU/mL |
IgE levels vary significantly by age. Elevated levels must be interpreted alongside symptoms, eosinophil count and specific allergen testing. Moderately high IgE alone is not diagnostic — it is a screening indicator that prompts further investigation.
What High IgE Levels Can Indicate
Common causes of elevated Total IgE by level:
- Mildly elevated (100–500 IU/mL) — Allergic rhinitis, mild asthma, atopic dermatitis, food allergy. Very common in urban populations with high pollution and allergen exposure.
- Moderately elevated (500–2,000 IU/mL) — Moderate to severe allergic disease, parasitic infection (worm infestation), drug hypersensitivity reactions, allergic bronchopulmonary aspergillosis.
- Significantly elevated (above 2,000 IU/mL) — Severe parasitic infection, Hyper-IgE Syndrome (Job's syndrome), severe atopic dermatitis, some immunodeficiency disorders.
- Low IgE (below 2 IU/mL) — Can indicate IgE deficiency or common variable immunodeficiency (CVID), associated with recurrent infections.
Total IgE vs Specific IgE — What is the Difference?
The Total IgE test measures the overall burden of all IgE antibodies in the blood. It tells you that an allergic or parasitic process is happening but cannot identify the specific trigger. A Specific IgE test (also called RAST or ImmunoCAP) measures IgE antibodies to individual allergens — for example, house dust mite, cockroach, grass pollen, cat dander, egg white, milk protein or peanut. If Total IgE is elevated, your doctor will order Specific IgE tests to identify the exact allergen causing your symptoms.
When is an IgE Test Recommended?
Your doctor may recommend an IgE test if you experience:
- Persistent runny nose, sneezing or nasal congestion (allergic rhinitis)
- Recurrent or chronic asthma — especially if triggered by environmental factors
- Skin rash, hives (urticaria) or atopic dermatitis (eczema)
- Itchy, watery or red eyes (allergic conjunctivitis)
- Food allergy symptoms — swelling, hives or digestive reactions after eating
- Suspected worm or parasitic infestation — especially with unexplained high eosinophil count
- Recurrent respiratory infections suggesting immunodeficiency
- Monitoring response to allergy immunotherapy (desensitization treatment)
- As part of a comprehensive allergy workup before specific allergen testing
What Conditions Does IgE Help Diagnose or Monitor?
- Allergic rhinitis (hay fever)
- Allergic (extrinsic) asthma
- Atopic dermatitis (eczema)
- Chronic urticaria (hives)
- Food allergies
- Drug hypersensitivity reactions
- Parasitic worm infections (helminths)
- Allergic bronchopulmonary aspergillosis (ABPA)
- Hyper-IgE Syndrome (Job's syndrome)
- Common Variable Immunodeficiency (CVID) — very low IgE
IgE Test Price in Kolkata
IgE (Immunoglobulin E) Test Price: ₹1,000
No fasting required | No special preparation | Free home collection above ₹2,000
No fasting required | No special preparation | Free home collection above ₹2,000
Tests Commonly Ordered Alongside IgE
- Absolute Eosinophil Count (AEC) — eosinophils rise alongside IgE in allergic and parasitic conditions. Together they confirm atopic disease or parasitic infection.
- CBC (Complete Blood Count) — checks for eosinophilia (elevated eosinophil percentage) which accompanies high IgE in allergies and parasites
- Specific IgE Panel (Allergy Panel) — identifies specific allergens (dust mite, cockroach, pollen, pet dander, food) when Total IgE is elevated
- Stool Routine & Microscopy — identifies parasitic worm eggs or cysts when high IgE suggests parasitic cause
- Skin Prick Test — gold standard for specific allergen identification, ordered alongside blood IgE when allergy clinic referral is made
- Spirometry / Peak Flow — lung function testing when allergic asthma is suspected alongside high IgE
Home Collection for IgE Test in Kolkata
Apollo Diagnostics provides home blood sample collection for IgE tests across North and Central Kolkata. No fasting or special preparation is required. Our phlebotomists arrive at your doorstep with sterile single-use equipment and samples are processed using advanced automated immunoassay technology at our NABL-certified central laboratory.
- Home collection available: 7:00 AM – 2:30 PM Daily
- No fasting required — book any time
- Free home collection on orders above ₹2,000
- Digital reports delivered to WhatsApp within 24 hours
Quick Links
→ Apollo Diagnostics Nagerbazar → Full List of Individual Tests → Book Home Collection → Full Body Checkup Packages
→ Apollo Diagnostics Nagerbazar → Full List of Individual Tests → Book Home Collection → Full Body Checkup Packages
Frequently Asked Questions
Q1. What is the IgE test used for?
The Total IgE test measures Immunoglobulin E antibodies in the blood to screen for allergic conditions and parasitic infections. It is used to investigate allergic rhinitis, asthma, eczema, hives, food allergies and suspected worm infestations. It is also the first step before ordering Specific IgE allergy panels to identify exact allergen triggers.
Q2. What is a normal IgE level?
Normal Total IgE in adults is below 100 IU/mL. Levels between 100–500 IU/mL suggest mild to moderate allergic disease or parasitic infection. Levels above 500 IU/mL indicate significant allergic burden, moderate to heavy parasitic infection or other atopic conditions. Levels above 2,000 IU/mL suggest severe parasitic infection or rare immunological conditions like Hyper-IgE Syndrome.
Q3. Does the IgE test require fasting?
No. The IgE test does not require fasting or any special preparation. Blood can be collected at any time of day. Results are typically available within 24 hours.
Q4. What is the IgE test price at Apollo Diagnostics Kolkata?
The IgE (Immunoglobulin E) test price at Apollo Diagnostics is ₹1,000. No fasting required. Home collection is available free on orders above ₹2,000.
Q5. What is the difference between Total IgE and Specific IgE?
Total IgE measures the overall level of all IgE antibodies in the blood — it confirms that an allergic or parasitic process is occurring but cannot identify the specific trigger. Specific IgE (RAST or ImmunoCAP) tests measure IgE antibodies to individual allergens such as house dust mite, cockroach, cat dander, pollen, milk or peanut. If Total IgE is elevated your doctor will order Specific IgE tests to identify exactly what you are allergic to.
Q6. Can parasitic worm infection cause high IgE?
Yes. Parasitic worm infections (helminths) such as roundworm (Ascaris), hookworm, filaria and tapeworm cause significant elevation of IgE — often dramatically so — as the immune system mounts an IgE-mediated response against the parasite. This is one of the most common causes of very high IgE levels in tropical regions like West Bengal. High IgE with high eosinophil count in the absence of obvious allergic symptoms strongly suggests parasitic infection and warrants stool examination.
Q7. Can high IgE confirm allergic asthma?
High Total IgE supports a diagnosis of allergic (extrinsic) asthma but alone is not diagnostic. About 60–80% of asthmatics have elevated IgE. High IgE alongside elevated eosinophil count and positive Specific IgE to relevant allergens (dust mite, cockroach, mold) strongly supports allergic asthma. In very high IgE asthma (above 300 IU/mL) biological therapy with anti-IgE medication (omalizumab/Xolair) may be considered by a specialist.
Q8. Is home collection available for IgE test in Kolkata?
Yes. Apollo Diagnostics provides home blood sample collection for IgE tests across Dum Dum, South Dum Dum, Nagerbazar, Satgachi, Baguiati, Lake Town, Bangur, Kaikhali, Sealdah, Entally, Phoolbagan, Tangra and surrounding areas. No fasting required. Book by calling or WhatsApping +91 8660434628.
Q9. How long does it take to get IgE test results?
IgE test results are typically available within 24 hours of sample collection. Reports are delivered digitally to your WhatsApp or email.
Q10. Which centre processes my IgE sample in Kolkata?
All samples collected across North and Central Kolkata are processed at Apollo Diagnostics Nagerbazar — Nandarani Apartment, 8A Narasingha Avenue, Nagerbazar, Dum Dum, Kolkata 700074. Our lab is NABL-certified and ISO-certified using advanced automated immunoassay technology.
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