Connective tissue disease antibody testing
Blood tests for autoantibodies, such as ANA, ENA and anti-dsDNA, used to help assess possible connective tissue (autoimmune rheumatic) diseases like lupus, alongside symptoms and examination.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- These blood tests look for autoantibodies (ANA, ENA, anti-dsDNA and others) to help assess possible connective tissue diseases such as lupus.
- A positive result, especially a low-level positive ANA, does not by itself mean you have a disease — many healthy people test positive.
- Results only make sense alongside symptoms and examination, so they should be interpreted by a specialist, not read in isolation.
- A negative ANA makes lupus unlikely, but no single antibody confirms or excludes a connective tissue disease on its own.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Can support a diagnosis of a connective tissue disease when symptoms suggest one.
These tests are the wrong choice as a general ‘health screen’ in someone without suggestive symptoms, because positives are common and often meaningless.
A quick blood draw from a vein. You can usually return to normal activities immediately.
Interpretation of every result alongside symptoms and examination by an appropriate clinician.
A quick blood draw from a vein. You can usually return to normal activities immediately.
No restrictions. Note any symptoms you want to discuss when results are reviewed.
The laboratory processes the sample, including any reflex ENA or anti-dsDNA tests, and reports the results.
A clinician interprets the results alongside your symptoms and examination, and explains what they do and do not...
What is connective tissue disease antibody testing?
Connective tissue diseases, also called autoimmune rheumatic diseases, are conditions in which the immune system attacks the body's own tissues. Examples include lupus (SLE), Sjogren's syndrome, scleroderma, inflammatory muscle disease and mixed connective tissue disease. The body can make autoantibodies, proteins aimed at its own cells, and blood tests can look for these.
The usual first test is the antinuclear antibody (ANA). If this is positive, more specific tests, such as ENA antibodies and anti-dsDNA, may follow to help point towards a particular condition. These tests are tools to support a diagnosis; they do not, by themselves, make one.
The single most important thing to understand is that a positive autoantibody test alone is not a disease. A low-level positive ANA is common in healthy people, especially women, older people and during pregnancy, and can also follow infections. These tests only have meaning when read alongside your symptoms and examination by a clinician, usually a rheumatologist. Ordered without a good clinical reason, they often cause needless worry.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
ANA vs more specific antibodies
| Feature | ANA | ENA / anti-dsDNA |
|---|---|---|
| Role | Screening test | More specific follow-on |
| Positive in healthy people | Fairly common (low level) | Much less common |
| If negative | Lupus unlikely | Does not exclude all disease |
| On its own | Cannot diagnose | Supports, not proof |
These tests guide a diagnosis but never replace the clinical picture. A specialist decides what the pattern of results means for you.
Preparing for your test
- Be clear about your symptoms before testing: joint pains, rashes, dry eyes or mouth, fatigue, Raynaud's (fingers changing colour in the cold), or unexplained fevers.
- Bring details of any previous antibody results so changes can be compared.
- List your medicines, as some can occasionally trigger autoantibodies (for example certain drugs causing drug-induced lupus).
- Note any family history of autoimmune disease.
- Mention if you are pregnant or could be, as this can affect both results and their interpretation.
- Understand that the test is being done to help answer a specific question, not as a general screen.
- Ask who will interpret the result and how you will be told.
What happens
The test is done on an ordinary blood sample taken from a vein, usually in your arm. No special preparation or fasting is normally needed. The sample goes to an immunology or pathology laboratory.
The laboratory first checks for ANA, reporting how strong it is and the pattern seen. Many UK labs then automatically test for ENA or anti-dsDNA if the ANA is positive at a level and pattern that warrants it, so the most useful follow-on tests are added without a new appointment. Depending on your symptoms, other antibody or blood tests may be requested at the same time.
You can usually carry on with your day straight away. The results are then interpreted by a clinician alongside your symptoms and examination.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- These tests are the wrong choice as a general ‘health screen’ in someone without suggestive symptoms, because positives are common and often meaningless.
- A single autoantibody test cannot diagnose or exclude a connective tissue disease on its own.
- They should not be used to chase vague, isolated tiredness without other features, as this often leads to unhelpful positives.
- They are not a substitute for clinical assessment and examination by an appropriate clinician.
Delay or rearrange if…
- There is no clear clinical question the test would answer, in which case it may be better not to test at all.
- A recent infection could be causing a temporary positive, which may settle.
- Pregnancy is a consideration and may affect interpretation.
- Previous results that would change interpretation are missing.
Alternatives to discuss
- No test, where there is no good clinical reason and a positive would only cause worry.
- A focused clinical assessment by a GP or rheumatologist to decide whether testing is justified.
- Other targeted tests (such as anti-CCP and rheumatoid factor) when inflammatory arthritis is the main question.
- Watchful review of symptoms over time, with testing only if features develop.
- Imaging or other investigations where organ involvement is the main concern.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Can support a diagnosis of a connective tissue disease when symptoms suggest one.
- Helps point towards a specific condition, guiding further care.
- A negative ANA can help make lupus unlikely and avoid unnecessary worry.
- Anti-dsDNA can help support a lupus diagnosis and, in some people, track disease activity.
- Helps decide who needs specialist rheumatology referral and monitoring.
- Can sometimes flag a condition early, before it is fully established, allowing closer follow-up.
Risks & complications
- Bruising or soreness where blood is taken
- A positive result that does not mean disease, causing anxiety (false positive)
- Being labelled with a result that needs careful explanation
- Needing further tests or repeat sampling to clarify the picture
- Unnecessary worry or investigation if the test was ordered without a clear reason
- A borderline or inconsistent result that is hard to interpret
- Feeling faint during the blood draw
- Infection at the needle site
- A genuine disease being missed if a negative result is over-relied on despite suggestive symptoms
- Over-treatment driven by a positive test rather than the clinical picture
The biggest risk with these tests is misinterpretation, not the blood draw. A positive autoantibody, especially a low-level positive ANA, is common in healthy people and is not a diagnosis on its own. Ordered without a good clinical reason, these tests can cause anxiety and lead to unnecessary investigations. Ask why the test is being done, what a positive or negative result would change, and make sure a clinician interprets it alongside your symptoms.
Published figures to discuss
These are screening and supporting tests, not yes/no answers. Their value depends entirely on the clinical context. A positive ANA is reported in a substantial minority of healthy people, more so at low levels and with increasing age, which is why interpretation matters more than the raw result. Exact figures vary between populations and laboratory methods, so precise percentages are not quoted here.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Positive ANA without connective-tissue disease | Common at low titres; around 10 to 20% of healthy people may test positive depending on assay and cut-off | Testing is most useful when symptoms suggest lupus, Sjogren's, systemic sclerosis, myositis or overlap disease. | Autoantibodies associated with connective tissue diseases: meaning for clinicians — PMCpmc.ncbi.nlm.nih.govPublished figure |
| Anti-Ro/La antibodies and congenital heart block | Uncommon; often quoted around 1 to 2% in a first affected pregnancy | Pregnancy planning should include specialist advice if anti-Ro or anti-La antibodies are present. | Autoantibodies associated with connective tissue diseases: meaning for clinicians — PMCpmc.ncbi.nlm.nih.govPublished figure |
| Weak ENA positives that do not match symptoms | Common source of confusion | A result should not be turned into a lifelong diagnosis unless the clinical picture fits. | Guide sourcesClinical context |
| Antibody-negative connective-tissue disease | Uncommon but recognised | Raynaud's with ulcers, inflammatory rashes, kidney findings or lung disease still needs assessment even with negative screening tests. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from a blood test. “Afterwards” means waiting for the result and, importantly, having it interpreted in the context of your symptoms.
- Mild tenderness or a small bruise at the needle site
- No change in how you feel from the test itself
- A wait for results, which can feel anxious
- Possibly being asked for repeat or further tests to clarify the picture
Aftercare
- Make sure your result is reviewed alongside your symptoms, not read in isolation.
- Keep a copy of your results, including the ANA strength and pattern.
- Do not assume a positive result means you have a disease until a clinician has explained it.
- Report new or worsening symptoms (such as rashes, joint swelling or breathlessness) that may need reassessment.
- Attend any specialist referral arranged, for example to rheumatology.
- Tell other clinicians about significant results so they are taken into account.
- Ask what would prompt repeat testing in the future.
- Clear list of your symptoms and when they occur
- Previous antibody results gathered together
- Current medicines list
- Family history of autoimmune disease noted
- Name of the clinician interpreting the result
- Understanding of what a positive or negative result would change
- Any specialist referral booked
⚠ Get urgent help if…
- Severe breathlessness or chest pain
- A new, widespread rash with feeling generally unwell or feverish
- Sudden severe joint swelling, especially with fever
- Reduced or frothy urine, or swelling of the legs (possible kidney involvement in lupus)
- Fingers or toes turning white or blue and becoming painful (severe Raynaud's)
- Any rapidly worsening symptoms alongside a known autoimmune condition
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A helpful result is one that fits the clinical picture. A negative ANA makes lupus unlikely, which can be reassuring. A positive ANA may need more specific tests (ENA, anti-dsDNA) to see whether a particular condition is suggested. Some antibodies, such as anti-dsDNA, are strongly linked to lupus, while others point towards Sjogren's, scleroderma or myositis.
A positive autoantibody is never, on its own, a diagnosis. Many healthy people, particularly women, older adults and during pregnancy, have a low-level positive ANA without any disease, and antibodies can appear years before, or without ever leading to, symptoms. The result must always be interpreted by a clinician alongside your symptoms and examination; the antibodies support a diagnosis but do not make one.
Autoantibody results can change over time. A low-level positive ANA in a well person may simply persist without ever causing disease, while in others a connective tissue disease can develop later. Some antibodies are used to monitor disease activity once a diagnosis is made. Tests may be repeated if your symptoms change, rather than routinely.
Related tests, treatments or support
These tests are often combined depending on the suspected condition. ANA is usually first, with ENA and anti-dsDNA added as more specific follow-on tests. Other tests, such as complement levels, anti-CCP, rheumatoid factor, antiphospholipid antibodies, inflammatory markers and urine tests, may be done alongside to build a fuller picture and to look for organ involvement.
Follow-up & long-term care
If a connective tissue disease is suspected or confirmed, you are usually referred to or followed up by a rheumatologist, who interprets the antibodies alongside your symptoms and arranges any further tests or treatment. If results are positive but you have no clear disease, you may be reassured or kept under review, with repeat testing only if symptoms develop. You should be told your results and what they mean.
- Repeat testing only when symptoms change or to monitor a known condition, not routinely.
- Keep a record of your antibody results over time.
- Stay alert to new symptoms that might warrant reassessment.
- Attend rheumatology follow-up if you have a diagnosed condition.
- Make sure new clinicians understand any significant results in context.
Repeat, follow-on and what comes next
- Results may be repeated if symptoms change, and some antibodies are used to monitor a known condition.
- A low-level positive in a well person is often simply kept under review rather than acted on.
- A positive result may need more specific follow-on tests to clarify its meaning.
- Interpretation can change as symptoms evolve over time.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Interpretation of every result alongside symptoms and examination by an appropriate clinician.
- A clear explanation of what a positive or negative result does and does not mean.
- Onward referral to rheumatology where a connective tissue disease is suspected.
- A sensible plan for review or repeat testing only if symptoms develop.
- A copy of the results, including ANA strength and pattern, for your records.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Which antibodies are tested (ANA alone or a wider panel including ENA and anti-dsDNA)
- Laboratory fees and how quickly results are reported
- Whether reflex follow-on tests are included in the price
- The cost of a specialist consultation to interpret the results
- Any additional tests done at the same time (such as complement or urine tests)
- Follow-up appointments and any onward rheumatology referral
- Exactly which antibody tests are included
- The blood-draw and laboratory fees
- Whether reflex ENA or anti-dsDNA testing is included if the ANA is positive
- The specialist consultation fee to interpret results
- How and when results will be reported to you
- What happens, and what it costs, if results are positive but unclear
- Cancellation and rebooking policy
On the NHS? Autoantibody testing for connective tissue disease is widely available on the NHS when clinically indicated; private testing may be used for faster access or a specialist opinion, but results still need interpreting alongside symptoms.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Treating a positive autoantibody as a diagnosis in its own right.
- Ordering broad panels without a clear clinical question, generating misleading positives.
- Not explaining that a low-level positive ANA is common and often harmless.
- Over-relying on a negative result despite clearly suggestive symptoms.
- Not telling the patient who will interpret the result and how they will hear it.
Marketing red flags
- Selling autoantibody ‘panels’ as part of a general wellness or health-screen package.
- Implying a positive ANA means you have, or will get, an autoimmune disease.
- Reporting results without proper clinical interpretation.
- Encouraging repeat private testing without a clear clinical reason.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Why am I having this test, and what specific question is it trying to answer?
- What would a positive or negative result actually change in my care?
- If my ANA is positive, will ENA and anti-dsDNA be checked, and what do they add?
- Could my result be a harmless positive, and how will we tell?
- Do my symptoms warrant referral to a rheumatologist?
- Will this test need repeating, and if so, when?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
I have a positive ANA — does that mean I have lupus or another autoimmune disease?
If my ANA is negative, am I in the clear?
Why shouldn't I just get a full autoantibody panel as a check-up?
What is the difference between ANA, ENA and anti-dsDNA?
Can medicines or pregnancy affect the results?
Is this testing available on the NHS?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: Lab Tests Online UK — Antinuclear Antibody (ANA) test NHS — Lupus NHS — Scleroderma NHS — Sjogren's syndrome Autoantibodies associated with connective tissue diseases: meaning for clinicians — PMC British Society for Rheumatology
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: Connective tissue disease assessment · Rheumatology consultation · Lupus (SLE) treatment · Sjögren's syndrome treatment · Scleroderma treatment