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Fluorescent Antibody Test for Anticardiolipin Antibodies (IgG and IgM) in Serum

Published: August 9, 2026Updated: August 16, 2026

This test measures antibodies in your blood that may be linked to certain autoimmune conditions or blood clotting issues.

Quick summary

["Helps identify potential autoimmune or thrombotic risks by detecting anticardiolipin antibodies in your serum."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
85535-3
Short code
FLUAV RNA TCID50 # Spec
Synonyms
FLUAV RNA TCID50 # Spec
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like unexplained fatigue, joint pain, or a history of blood clots, pregnancy complications, or autoimmune diseases. It may also be used to monitor conditions like lupus or other connective tissue disorders.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from your arm. The test analyzes serum (liquid part of blood after clotting) for specific antibodies.

What the Results Mean

Results are qualitative (positive or negative) and indicate whether your blood contains elevated levels of anticardiolipin antibodies. Elevated levels may suggest an increased risk of autoimmune or thrombotic conditions.

Common Conditions Linked to Positive Results

Positive results may be associated with autoimmune diseases like lupus, antiphospholipid syndrome, or other conditions affecting blood clotting. Always discuss results with your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Anticardiolipin antibodies are often detected as part of an autoimmune workup, particularly in patients with a history of recurrent miscarriages, venous thrombosis, or neurological symptoms. While not definitive, they can guide further testing or treatment decisions.

Short name

Anticardiolipin Antibodies (IgG/IgM) Screen

Frequently asked questions

What triggers this test?
This test is often ordered if you have symptoms or a history of conditions like lupus, blood clots, or pregnancy complications. Your doctor may also recommend it during routine evaluations for autoimmune disorders.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times.
Can lifestyle changes affect this test?
No specific lifestyle changes are known to alter anticardiolipin antibody levels. However, always follow your doctor’s advice regarding medications or supplements that may interact with test results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy