ANA Screen (IFA)
Antinuclear antibody (ANA) screen by indirect immunofluorescence assay (IFA). A first-line screening test for autoimmune diseases affecting the nucleus of cells.
Category: Inflammation & Immune
Also known as: ana screen, ifa
Reference range: 0–0 (Source: ABIM)
High values may indicate
A positive ANA result may suggest an autoimmune condition such as systemic lupus erythematosus (SLE), Sjögren's syndrome, or other connective tissue diseases. Further confirmatory testing is required.
Low values may indicate
A negative ANA result suggests that an ANA-associated autoimmune disease is unlikely at this time.
Frequently asked questions
- What is a normal ANA Screen (IFA) level?
- A typical reference range for ANA Screen (IFA) is 0–0 (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- Where do ANA Screen (IFA) reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track ANA Screen (IFA) over time?
- Yes. Upload results from any lab and BloodId charts your ANA Screen (IFA) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: BloodId admin-reviewed
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