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Fluorescent Immunoassay for Antinuclear Antibodies (ANA) in Serum

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

This test detects antibodies in your blood that may attack healthy cells in your body, often linked to autoimmune conditions.

Quick summary

["ANA testing helps identify possible autoimmune diseases by checking for abnormal antibodies in your serum."]

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

Key facts at a glance

LOINC
34487-9
Short code
FLUAV RNA Spec Ql NAA+probe
Synonyms
FLUAV RNA Spec Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 Is Done

Your healthcare provider may order this test if you have symptoms like joint pain, unexplained rashes, fatigue, or other signs of an autoimmune disorder. It can also be part of routine screening for certain conditions or when other tests suggest inflammation or immune system activity.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from your arm in a clinic or lab. The test uses a fluorescent probe to detect specific antibodies in your serum.

What the Test Results Mean

Results are qualitative (positive or negative) and not tied to a specific numeric range. A positive result suggests the presence of antinuclear antibodies, which may indicate an autoimmune condition, but further testing is needed to determine the exact cause.

Common Conditions Linked to Positive Results

Positive ANA results are common in diseases like lupus, rheumatoid arthritis, scleroderma, or mixed connective tissue disease. However, many people test positive without symptoms or a diagnosed condition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Antinuclear antibodies are markers of autoimmune activity, where the immune system mistakenly targets your body’s own cells. While ANA testing is not definitive, it helps guide further evaluation. Positive results may prompt additional testing (e.g., specific antibody panels, clinical correlation) to narrow down possible diagnoses.

Short name

ANA Fluorescence Probe Test

Frequently asked questions

What does a positive ANA test mean for my health?
A positive ANA test means your blood contains antibodies that target parts of your cells. This can be common in autoimmune diseases but doesn’t always mean you have one. Your doctor will discuss next steps, such as additional tests or monitoring, based on your symptoms and other health factors.
Can a positive ANA test be false positive?
Yes, a positive ANA test can occur in people without autoimmune disease, especially in older adults or those with certain infections. However, false positives are less common with modern fluorescent immunoassay methods. Your doctor will consider your symptoms and other test results to interpret the result accurately.
How often should I get this test if I have a positive ANA result?
If your ANA test is positive, your doctor may recommend follow-up testing (like specific antibody panels) or monitoring based on your symptoms. Frequency depends on your condition—some people need testing every few months, while others may only need it once. Follow your healthcare provider’s guidance.
  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