Allergy, Dermatophagoides farinae Test: Booking, Price, and Results
About Allergy, Dermatophagoides farinae Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | D. farinae IgE Test, American House Dust Mite Allergy Test, House Dust Mite (D. farinae) Specific IgE, Dust Mite Allergen d2 IgE |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting required |
| Report Time | 2 to 5 business days |
| Recommended For | All ages, both genders |
| Price | Starting at ₹1,300 |
What Is an Allergy Dermatophagoides farinae Test?
The Allergy Dermatophagoides farinae test measures specific IgE antibodies in your blood. IgE antibodies are proteins your immune system produces when it reacts to a particular allergen. This test detects whether your immune system has been sensitised to Dermatophagoides farinae, a common species of house dust mite found in many Indian homes. It is also known as the American House Dust Mite Allergy test or the D. farinae IgE test. A small blood sample drawn from a vein in your arm is all that is needed.
What Does an Allergy Dermatophagoides farinae Test Measure?
This test analyses a single key marker in your blood. The table below explains what is measured and why it matters:
| Parameter | What It Measures | Why It Matters |
|---|---|---|
| Dermatophagoides farinae Specific IgE | The level of IgE antibodies directed against D. farinae allergens in your serum | A detectable level indicates your immune system has recognised this dust mite as a threat, which may explain allergy symptoms |
Results are reported in kU/L (kilounits per litre) and classified into groups from Class 0 (no sensitisation) to Class 6 (very high sensitisation). This classification helps your doctor gauge the degree of your immune response to this allergen.
Why Is an Allergy Dermatophagoides farinae Test Done?
Your doctor may order this test when a dust mite allergy is suspected. The sections below explain the common reasons.
Common Symptoms That May Require This Test
Several symptoms may prompt your doctor to request a D. farinae IgE test near me or at a nearby lab. Here are the most common ones:
- Persistent runny or stuffy nose, especially indoors
- Itchy, watery, or red eyes
- Itchy nose, throat, or roof of the mouth
- Mucus dripping down the back of the throat (also called postnasal drip)
- Wheezing or a whistling sound when breathing out
- Chest tightness or difficulty breathing
- Disturbed sleep caused by coughing or shortness of breath
Conditions This Test Can Help Detect
The Allergy Dermatophagoides farinae test can help identify sensitisation linked to several conditions:
- Allergic rhinitis (persistent runny nose and eye inflammation)
- Allergic asthma triggered or worsened by dust mite exposure
- Atopic dermatitis, commonly known as eczema
- Allergic rhinoconjunctivitis (combined nose and eye inflammation)
How to Prepare and What to Expect
No special preparation is needed for this test. The steps below will walk you through what happens on the day.
Do You Need to Fast?
No, fasting is not required before this test. You can eat and drink normally beforehand. If your doctor has ordered other blood tests alongside this one, check whether any of those require fasting.
Practical Tips Before Your Test
A little preparation can make the process smooth and comfortable. Keep the following in mind:
- Tell your doctor about any antihistamines, immunosuppressants, or supplements you are taking, as these may affect results.
- Wear a short-sleeved top or clothing with sleeves that roll up easily.
- Drink water before your appointment to keep your veins easy to access.
- Avoid strenuous exercise on the morning of your test.
Step-by-Step Procedure
Here is what to expect when your blood sample is collected:
- A trained phlebotomist (blood collection professional) reviews your details and selects a suitable vein, usually in the crook of your elbow.
- An elastic band is placed around your upper arm to make the vein more visible.
- The skin over the vein is cleaned with an antiseptic swab.
- A fine needle is gently inserted into the vein, and a small amount of blood is drawn into a collection tube.
- The needle is removed, and a cotton ball or gauze pad is pressed over the site for a moment.
- The labelled sample is packaged and dispatched to the laboratory for testing.
Factors That Can Affect Accuracy
Certain factors can influence how reliable your result is. These include:
- Very high total IgE levels in the blood (above 2,500 kU/L), which can sometimes produce a false positive
- Use of antihistamines before the test
- Parasitic infections, which can raise overall IgE levels
- Immunosuppressive medications
- Differences in test kits or laboratory methods used
- Poor sample handling or delays in transport
Understanding Your Allergy Dermatophagoides farinae Test Results
Your result will show an IgE level in kU/L alongside a class rating. The table below outlines what each class means.
| Class | IgE Level (kU/L) | Interpretation |
|---|---|---|
| 0 | Less than 0.35 | Negative (no sensitisation detected) |
| 1 | 0.35 to 0.69 | Low or weak positive |
| 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 |
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 circumstances can alter how results should be read:
- Patients with total serum IgE above 2,500 kU/L may receive a false-positive result because of nonspecific binding in the test.
- Parasitic infections can elevate overall IgE levels, which may affect interpretation.
- Recent immunotherapy or immunosuppressive treatment may lower detectable IgE levels, making results harder to interpret.
How to Maintain Healthy Levels
Reducing exposure to dust mites at home is the most practical way to manage sensitisation. The tips below are general wellness measures:
- Keep indoor humidity below 50% using a dehumidifier or air conditioner, as dust mites thrive in humid conditions.
- Wash bed linen, pillowcases, and blankets weekly in hot water (at least 54°C) to reduce mite populations.
- Use allergen-blocking covers on mattresses and pillows to limit direct contact with mite allergens.
Lupin Diagnostics Allergy Dermatophagoides farinae Test Price and Home Collection
The Allergy Dermatophagoides farinae test price starts at approximately ₹1,300, and home collection is available across India. Prices vary by city, as shown below.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1,300 |
| Bangalore | ₹1,300 |
| Chennai | ₹1,300 |
| Kolkata | ₹1,300 |
| Hyderabad | ₹1,300 |
| Pune | ₹1,300 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your Allergy Dermatophagoides farinae test is straightforward. Follow these steps:
- 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 this test across multiple cities, so you do not need to visit a centre. All samples are processed in NABL-accredited laboratories by qualified technologists. Your digital report is delivered directly to your email or WhatsApp within 2 to 5 business days.
Frequently Asked Questions
Dermatophagoides farinae is a species of house dust mite, also called the American House Dust Mite. It belongs to the same family as other common dust mites and tends to be found in drier indoor environments. Its microscopic body particles and waste products are a well-known trigger for allergic reactions in sensitive individuals.
A skin prick test exposes a small area of your skin to allergens and observes the reaction. The D. farinae IgE test measures IgE antibodies directly in a blood sample, making it a better option for people with skin conditions or those taking certain medications that could interfere with skin testing. Both methods assess sensitisation, but the blood test avoids any direct allergen exposure.
Unlike skin prick tests, antihistamines do not significantly affect IgE blood test results. However, you should still inform your doctor about any medications or supplements you are taking before your sample is collected, so your results can be interpreted correctly.
A positive result does not automatically confirm an active allergy. It is possible to have measurable IgE levels against an allergen without experiencing obvious symptoms. Your doctor will look at your result alongside your clinical history and reported symptoms to decide whether it is relevant to your health.
A negative result suggests there is no IgE-mediated sensitisation to D. farinae detected at the time of testing. However, allergy symptoms can also be caused by other allergens or by non-allergic conditions. Your doctor may suggest additional tests if your symptoms continue.
Dust mite allergy commonly develops during childhood or adolescence. Most people who are sensitised begin showing symptoms before the age of 20, though adults can also develop the condition for the first time.
Allergy, Dermatophagoides farinae Test: Booking, Price, and Results
