Cardiolipin Antibody IgA Test
About Cardiolipin Antibody IgA Test
| Field | Value |
|---|---|
| Also Known As | ACA IgA, aCL IgA, Anticardiolipin Antibodies (IgA), Anti-Cardiolipin Antibody - Serum (IgA), Cardiolipin Antibody (ACL) IgA, Antiphospholipid Antibodies (IgA), Phospholipid Antibody IgA |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting required |
| Report Time | 3 to 5 working days |
| Recommended For | Adults of any gender, particularly women with recurrent pregnancy loss, individuals with unexplained blood clots, or those with suspected autoimmune disorders |
| Price | Starting at ₹800 |
What Is a Cardiolipin Antibody IgA Test?
The Cardiolipin Antibody (ACL) IgA Test detects a specific class of autoantibodies called immunoglobulin A (IgA) that target cardiolipin, a fat molecule found in cell membranes and platelets. A blood sample drawn from a vein is used for this test. It is also known as ACA IgA, aCL IgA, or Antiphospholipid Antibodies (IgA). Doctors order it when they suspect an autoimmune condition affecting blood clotting, particularly in patients who have tested negative for the more common IgG and IgM cardiolipin antibodies.
What Does a Cardiolipin Antibody IgA Test Measure?
This test looks for one specific type of antibody in the blood. Here is what it detects and why it matters.
| Parameter | What It Represents |
|---|---|
| Anticardiolipin Antibodies (IgA) | IgA-class autoantibodies that mistakenly attack cardiolipin, a phospholipid that plays a role in regulating blood clotting |
There are three classes of cardiolipin antibodies: IgG, IgM, and IgA. IgG and IgM are tested first. The Anti-Cardiolipin Antibody - Serum (IgA) test is ordered when those results are negative, but a doctor still suspects an underlying autoimmune condition.
Why Is a Cardiolipin Antibody IgA Test Done?
This test is ordered for a range of reasons, from investigating unexplained symptoms to confirming a suspected diagnosis.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to request this test:
- Unexplained blood clots in the legs, lungs, or brain
- Recurrent miscarriages with no clear cause
- Leg pain or swelling (a sign of deep vein thrombosis)
- Shortness of breath without an obvious reason
- Persistent headaches or stroke-like episodes
- A skin pattern called livedo reticularis (a mottled, net-like skin discolouration)
- Symptoms of a low platelet count, such as easy bruising or unusual bleeding
- Autoimmune diseases such as systemic lupus erythematosus (SLE)
Conditions This Test Can Help Detect
The test can support the diagnosis of several conditions. These include:
- Antiphospholipid syndrome (APS), an autoimmune disorder that causes abnormal blood clots
- Systemic lupus erythematosus (SLE), a chronic autoimmune disease
- Arterial and venous thrombosis (clots in arteries or veins)
- Thrombocytopenia (a low platelet count)
- False-positive syphilis screening results
- Other autoimmune conditions and certain infections
Anticardiolipin Antibodies (IgA) are particularly useful when IgG and IgM results are negative but clinical signs still point to antiphospholipid syndrome.
How to Prepare and What to Expect
No special preparation is needed for this test. However, a few simple steps will help ensure an accurate result.
Do You Need to Fast?
No. Fasting is not required before the Cardiolipin Antibody (ACL) IgA Test. You can eat and drink normally before your sample is collected.
Practical Tips Before Your Test
Keep the following points in mind before you go for sample collection:
- Tell your doctor about all medicines and supplements you are currently taking, as some can affect results
- If you are on anticoagulants (blood thinners), make sure your doctor is aware before the test
- Drink plenty of water to stay hydrated, as this makes the blood draw easier
- Avoid getting tested during an active infection or shortly after a thrombotic episode, as these can influence results
Step-by-Step Procedure
Here is what typically happens during sample collection:
- A trained phlebotomist will ask you to sit comfortably and roll up your sleeve.
- The skin on your inner elbow or the back of your hand is cleaned with an antiseptic wipe.
- An elastic band is placed around your upper arm to make the vein more visible.
- A small needle is gently inserted into the vein, and blood is drawn into a serum separator tube.
- The elastic band is removed, and the needle is taken out. A cotton swab is pressed briefly on the site.
- The sample is separated and dispatched to the laboratory, ideally within two hours of collection, for analysis using an ELISA (enzyme-linked immunosorbent assay) method.
Factors That Can Affect Accuracy
Several factors can influence the reliability of results:
- Recent viral or bacterial infections
- Certain medicines, including phenytoin, penicillin, and procainamide
- Testing during an active thrombotic episode
- Delays in sample handling or storage issues
- Differences in testing methods between laboratories
Understanding Your Cardiolipin Antibody IgA Test Results
Results from this test should always be reviewed by your doctor alongside your symptoms and medical history. The table below shows commonly used reference ranges.
| Result Category | Range (APL Units) | Interpretation |
|---|---|---|
| Negative (Normal) | Less than 15 APL | Antibodies not detected or below threshold |
| Weakly Positive | 15.0 or greater | High antibody levels present |
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.
Some laboratories use a different scale, reporting results in U/mL, where values below 20 U/mL are considered negative, and values of 20 U/mL or above are considered positive. APL stands for IgA phospholipid units; one APL unit equals one microgram of IgA antibody.
If you test positive for cardiolipin antibodies, you will most likely be retested to see if the antibodies remain in your blood for longer periods of time. A retest is usually recommended 12 weeks after the initial test.
Results During Special Conditions
- Infections such as syphilis, malaria, hepatitis, parasitic diseases, and infectious mononucleosis can temporarily raise aCL IgA levels. These infection-related antibodies usually disappear once the illness resolves and are not typically linked to a higher risk of blood clots.
- Some prescription medicines can also trigger the production of anticardiolipin antibodies. Your doctor will consider any recent illness or medication use when reviewing your results.
How to Maintain Healthy Levels
These general tips support overall immune health:
- Follow a balanced diet rich in vegetables, whole grains, and healthy fats to support immune function.
- Let your doctor know if you have a family history of autoimmune disorders or clotting problems.
- If your result is positive, follow your doctor's advice about repeat testing, as a positive finding generally needs to be confirmed at least 12 weeks later before any diagnosis is made.
Lupin Diagnostics Cardiolipin Antibody IgA Test Price and Home Collection
The Cardiolipin Antibody (ACL) IgA Test is available at Lupin Diagnostics, with home sample collection offered across cities. Pricing estimates based on available aggregator data are shown below.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹800 |
| Kolkata | ₹800 |
| Bangalore | ₹800 |
| Chennai | ₹800 |
| Pune | ₹800 |
| Hyderabad | ₹800 |
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 across cities, so you can have your blood drawn at a time and place that suits you. All samples are processed in NABL-accredited laboratories by trained technologists. Digital reports are delivered directly to your email or WhatsApp.
Frequently Asked Questions
All three tests detect antibodies against cardiolipin, but each belongs to a different immunoglobulin class. IgG and IgM are the two most commonly tested types. The ACA IgA test is typically ordered when IgG and IgM results are negative, but a doctor still suspects antiphospholipid syndrome based on clinical signs.
Antibodies can rise temporarily during infections and then return to normal. To count as a diagnostic finding for antiphospholipid syndrome, a positive result must be detected on two separate occasions at least 12 weeks apart. This confirms that the antibodies are persistent rather than transient.
No. Anticardiolipin Antibodies (IgA) are not part of the formal laboratory criteria for diagnosing antiphospholipid syndrome on their own. A positive result must be reviewed alongside clinical symptoms, other antibody tests, and medical history before any diagnosis is made.
Yes. Infections such as syphilis, malaria, and infectious mononucleosis can temporarily raise antiphospholipid antibody (IgA) levels. These antibodies are usually short-lived and resolve once the infection clears. Your doctor will factor in any recent illness when interpreting your result.
No fasting is required. You can eat and drink as normal before the test. However, do tell your doctor about any medicines or supplements you are taking, as some can interfere with results.
An isolated positive aCL IgA result without positive IgG or IgM findings is uncommon. It should be interpreted with caution by your doctor in the context of your symptoms and overall health. It does not automatically indicate antiphospholipid syndrome and may reflect a transient response to an infection.
This test is not part of routine antenatal screening. A doctor may order it for women who have experienced recurrent miscarriages or unexplained blood clots to investigate whether antiphospholipid syndrome could be a contributing factor.
Cardiolipin Antibody IgA Test
