Cardiolipin Antibodies (IgG and IgM) Test
About Cardiolipin Antibodies (IgG and IgM) Test
| Field | Value |
|---|---|
| Also Known As | Anticardiolipin Antibodies (IgG and IgM) Test, aCL IgG/IgM Test, Anti-Cardiolipin Antibody (ACA) Test, Phospholipid Antibodies Test, Antiphospholipid Antibody Test |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting required |
| Report Time | 1 to 4 working days |
| Recommended For | Adults of all genders; especially women of childbearing age with unexplained clotting, recurrent miscarriages, or suspected autoimmune disorders |
| Price | Starting at ₹1,500 |
What Is a Cardiolipin Antibodies (IgG and IgM) Test?
The cardiolipin antibodies (IgG and IgM) test checks for specific autoantibodies in your blood that target cardiolipin, a fat-like molecule found in cell membranes that plays a role in regulating blood clotting. Autoantibodies are proteins the immune system produces when it mistakenly attacks the body's own cells.
Also called the anticardiolipin antibody test or ACA IgG IgM test, it is commonly ordered when a doctor suspects an autoimmune clotting disorder. A blood sample drawn from a vein in your arm is all that is needed.
What Does a Cardiolipin Antibodies (IgG and IgM) Test Measure?
This aCL IgG IgM test looks for two distinct types of antibody directed against cardiolipin. The table below explains what each one tells your doctor.
| Antibody | What It Represents |
|---|---|
| Anticardiolipin IgG | Produced later in an immune response and stays in the body longer, pointing to ongoing or chronic immune activation |
| Anticardiolipin IgM | Usually the first antibody the immune system makes; its presence may suggest a more recent or acute immune reaction |
Testing both types together gives a clearer picture of whether an autoimmune process is active and how long it may have been present.
Why Is a Cardiolipin Antibodies (IgG and IgM) Test Done?
Doctors order this anticardiolipin antibodies IgG and IgM test when certain signs or symptoms suggest a problem with the immune system or blood clotting.
Common Symptoms That May Require This Test
The following symptoms are among the most common reasons a doctor may request this test:
- Pain and swelling in the leg, which may indicate a deep vein clot
- Breathlessness that occurs without an obvious cause
- Persistent or recurring headaches and migraines
- Skin that appears mottled or has a lace-like discolouration (livedo reticularis)
- Skin colour changes without a clear explanation
- Unusual or unexplained bleeding from the nose or gums
- Repeated pregnancy losses, particularly in the second or third trimester
Conditions This Test Can Help Detect
The cardiolipin antibody IgG and IgM test can help identify a range of conditions, including:
- Antiphospholipid syndrome (APS), an autoimmune disorder that causes abnormal blood clotting and pregnancy complications
- Systemic lupus erythematosus (SLE), a condition in which the immune system attacks multiple organs
- Deep vein thrombosis or arterial blood clots
- Recurrent miscarriage linked to immune system activity
- Low platelet count (thrombocytopenia)
Cardiolipin Antibodies (IgG and IgM) Test During Pregnancy
This test is routinely ordered for women who have had unexplained recurrent miscarriages or complications during pregnancy. Research suggests that around 10 to 15% of women with repeated pregnancy losses are found to have antiphospholipid syndrome. Both IgG and IgM anticardiolipin antibodies are linked to a higher risk of miscarriage, as well as complications such as high blood pressure in pregnancy (preeclampsia), restricted foetal growth, and poor placental function.
Cardiolipin Antibodies (IgG and IgM) Test for Chronic Disease Monitoring
In patients with systemic lupus erythematosus, IgG anticardiolipin levels are associated with disease activity, making this test useful for ongoing monitoring. If antibodies are detected initially, the aCL antibody test is usually repeated 12 weeks later to confirm whether they are persistent. For patients receiving anticoagulant (blood-thinning) therapy for APS, regular retesting helps track treatment response.
How to Prepare and What to Expect
No complex preparation is needed for this test. Here is what you should know before your appointment.
Do You Need to Fast?
No, fasting is not required. You can eat and drink as usual before the test. If your doctor has ordered additional tests at the same time, check whether any of those require fasting.
Practical Tips Before Your Test
A little preparation on your part helps ensure a smooth sample collection:
- Tell your doctor about all prescription medicines, over-the-counter drugs, and supplements you are taking
- Disclose any prior clotting events, autoimmune conditions, or current pregnancy
- Wear clothing with loose or short sleeves for easy access to the arm
- Drink enough water beforehand, as good hydration makes veins easier to locate
Step-by-Step Procedure
The blood collection process is quick and straightforward. Here is what happens during your visit:
- A trained phlebotomist (blood collection specialist) cleans a spot on your inner arm with an antiseptic solution
- A soft band (tourniquet) is placed around your upper arm to help the vein become more visible
- A fine needle is gently inserted into the vein to draw a small amount of blood
- Once enough blood has been collected, the needle is removed and the site is pressed with cotton to stop any minor bleeding
- A small bandage or cotton ball is placed over the puncture site
- Your labelled sample is securely packed and dispatched to the laboratory, where it is tested using specialised immunological methods
Factors That Can Affect Accuracy
Certain factors may influence your result. Your doctor will consider these when reviewing your report:
- Acute infections, HIV, or certain cancers can cause temporary antibody elevation
- Specific medications, including phenytoin, penicillin, and procainamide, may produce transient positive results
- Advanced age is associated with higher antibody levels in some individuals
- The IgM result can be affected by elevated general immunoglobulin levels or the presence of rheumatoid factor
- Improper sample storage or handling can affect accuracy
Understanding Your Cardiolipin Antibodies (IgG and IgM) Test Results
Your report will show levels for both IgG and IgM antibodies, along with a qualitative interpretation. The table below outlines the general reference ranges used for this anticardiolipin antibody test.
| Parameter | Negative | Weak Positive | Positive | Unit |
|---|---|---|---|---|
| Anticardiolipin IgG | Below 10 | 10 to 40 | Above 40 | GPL U/mL |
| Anticardiolipin IgM | Below 10 | 10 to 40 | Above 40 | MPL U/mL |
For a diagnosis of antiphospholipid syndrome, medium or high levels (above 40 units, or above the 99th percentile) must be detected on two separate occasions at least 12 weeks apart.
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 situations can produce results that require careful interpretation:
- Certain infectious diseases, including syphilis, can trigger temporary antibody production. Cardiolipin is also used in syphilis screening (VDRL) tests, meaning a person with elevated cardiolipin antibodies may occasionally show a false-positive syphilis result.
- Older adults tend to have higher rates of positive results; one study found that over half of nursing home residents above the age of 80 tested positive without any associated symptoms.
- Acute illnesses, HIV infection, and some cancers can cause antibody levels to rise temporarily and then fall once the underlying condition resolves.
How to Maintain Healthy Levels
While the immune system cannot be controlled entirely through lifestyle, the following general habits support circulatory health:
- Eat a balanced diet and stay physically active to support healthy blood flow
- Keep yourself well hydrated throughout the day, as dehydration can increase the tendency for blood to clot
- Avoid smoking and try not to sit still for long periods, particularly during travel
Lupin Diagnostics Cardiolipin Antibodies (IgG and IgM) Test Price and Home Collection
The cardiolipin antibody test price at Lupin Diagnostics starts at approximately ₹1,500, with home collection available across major cities. The indicative city-wise prices are shown below.
| City | Approximate Price (₹) |
|---|---|
| Hyderabad | ₹1,500 |
| Bhopal | ₹1,500 |
| Mumbai | ₹1,500 |
| Bangalore | ₹1,500 |
| Chennai | ₹1,500 |
| Kolkata | ₹1,500 |
| Pune | ₹1,500 |
| Indore | ₹1,500 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your ACA IgG IgM test with Lupin Diagnostics takes just a few 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 the anti-cardiolipin antibody test across cities, so you can get tested without visiting a centre. All samples are processed in NABL-accredited laboratories by experienced technologists. Your digital report is delivered securely via email or WhatsApp once ready.
Frequently Asked Questions
A positive result means that cardiolipin antibodies are present in your blood. This suggests a possible increased risk of blood clotting or related complications, but a single positive result does not confirm a diagnosis. Your doctor will consider your full medical history and may request a repeat test before drawing any conclusions.
A positive result is repeated after 12 weeks to determine whether the antibodies are persistent or temporary. Transient antibodies can appear due to infections or short-term triggers and often decline on their own. Only persistent antibody levels carry clinical significance for conditions like antiphospholipid syndrome.
Yes, this can happen in some cases. The reagents used in standard syphilis screening tests (VDRL/RPR) contain phospholipid compounds, which can cross-react with cardiolipin antibodies. If you have a positive syphilis screening result without a confirmed infection, your doctor may order the antiphospholipid antibody test (cardiolipin IgG/IgM) to investigate further.
IgG antibodies generally reflect a longer-standing or chronic immune response, while IgM antibodies tend to appear earlier and may suggest a more recent immune trigger. IgG positivity is generally associated with a higher risk of clotting than isolated IgM positivity, though both are measured together for a complete assessment.
Yes. Research indicates that up to 10% of otherwise healthy individuals who have no autoimmune disease may experience isolated or temporary, low-level positive tests for these antibodies without having any symptoms. Antibodies can also appear temporarily due to minor infections, certain medications, or advancing age, carrying no dangerous clinical significance in these situations.
No special preparation is needed. You do not need to fast, and the test can be done at any time of day. Simply inform your doctor or the collection team about any medications you are taking and mention if you are pregnant or have a history of clotting.
Elevated levels are most often associated with antiphospholipid syndrome (APS) and systemic lupus erythematosus (SLE). These autoimmune conditions can cause abnormal blood clotting, recurrent pregnancy loss, and in some cases, stroke or organ damage. A doctor will assess the result alongside your symptoms and other test findings.
Cardiolipin Antibodies (IgG and IgM) Test
