Titers ≥ 1:160 usually indicate the presence of active SLE, although occasionally other autoimmune disease may induce these high titers. There are now known groups of ANA-negative lupus patients.

Is a 1 160 ANA titer high?

A titer of 1:160 or above is commonly considered a positive test result. Other conditions with ANA associations include Crohn’s disease, mononucleosis, subacute bacterial endocarditis, tuberculosis, and lymphoproliferative diseases.

What is a normal ANA titer level?

Normal Results Titres are reported in ratios, most often 1:40, 1:80, 1:160, 1:320, and 1:640. Some, but not all labs will report a titre above 1:160 as positive. Patterns that are reported include, homogeneous, speckled, centromere, and others.

What does ANA titer 1 160 speckled pattern mean?

We suggest that ANA tests showing speckled pattern should be at a 1:160 titer or higher to be considered positive; other patterns such as homogeneous, peripheral, or centromeric might be considered positive even at low titers (</=1:40) although this needs investigation.

What is a high positive ANA titer?

If the ANA titre is high (e.g. 1:640, 1:1280 or 1:2560), this indicates more severe disease. If the ANA titre is low (e.g. 1:40, 1:80 or even 1:160), there is often no autoimmune disease. If the ANA titre is in the middle (e.g. 1:320), the result is less clear and should be interpreted in the clinical context.

What is a high titer for lupus?

An ANA titer of 1:40 or higher is considered positive. An ANA titer of less than 1:40 is useful for ruling out SLE in children (sensitivity of 98%). A repeated negative result makes a diagnosis of SLE unlikely but not impossible.

Should I be worried about a positive ANA test?

Remember, a positive ANA does not equal an autoimmune disease. But also remember that if it is determined that you do have an autoimmune disease, there are treatment options for it. So if you have a positive ANA, don’t panic.

Can you have a speckled ANA and not have an autoimmune disease?

The speckled pattern is seen in many conditions and in people who do not have any autoimmune disease. These patterns are determined by technical experts who routinely interpret the tests.

Can you have a speckled ANA and not have lupus?

A positive ANA does not by itself diagnose lupus since about 10% of normal people and many people with other autoimmune diseases, such as thyroid disease, also have positive tests, but usually less strongly positive. Once positive, an ANA mostly stays positive, so need not be repeated.

Can positive ANA go away?

The new criteria require that the test for antinuclear antibody (ANA) must be positive, at least once, but not necessarily at the time of the diagnosis decision because an ANA can become negative with treatment or remission.

Article first time published on

What is the difference between ANA and ANA titer?

The level to which a patient’s sample can be diluted and still produce recognizable staining is known as the ANA “titer.” The ANA titer is a measure of the amount of ANA in the blood; the higher the titer, the more autoantibodies are present in the sample.

What is the highest ANA titer?

In our laboratory, an ANA titer of 1:640 is defined as a “high titer” because of a 0.5% prevalence of positives in normal individuals. Therefore, we divided the patients into a high titer group (≥1:640) and low titer group (<1:640).

How do I read my ANA profile results?

Your test is positive if it finds antinuclear antibodies in your blood. A negative result means it found none. A positive test doesn’t mean that you have an autoimmune condition. Between 3% and 15% of people with no conditions have antinuclear antibodies.

What infections cause a positive ANA?

Autoimmune diseases – A positive ANA test is often seen in patients with Lupus, Sjogren, scleroderma, inflammatory myositis, vasculitis and even rheumatoid arthritis. Besides, autoimmune thyroiditis, multiple sclerosis, autoimmune hepatitis can also cause a positive ANA test.

What cancers are associated with positive ANA?

Neoplastic diseases may cause positive ANA. Some authors have described that ANA is found in the sera from lung, breast, head and neck cancer patients as frequently as in RA and SLE 3, 4, 5. Chapman et al. 6 has suggested that in breast cancer they may be used as an aid to early diagnosis.

What are the typical signs and symptoms of autoimmune diseases using lupus as an example?

• Fatigue.
• Fever.
• Joint pain, stiffness and swelling.
• Butterfly-shaped rash on the face that covers the cheeks and bridge of the nose or rashes elsewhere on the body.
• Skin lesions that appear or worsen with sun exposure.

What tests are done after a positive ANA?

For patients with a positive ANA, more tests are usually performed to check for other antibodies that can help confirm the diagnosis. This series of tests, commonly called an ANA panel, checks for the following antibodies: anti-double-stranded DNA, anti-Smith, anti-U1RNP, anti-Ro/SSA, and anti-La/SSB.

Can inflammation cause positive ANA?

Autoantibodies to cartilage proteoglycan can be measured in several systemic and joint-specific rheumatic diseases including Sjogren’s Syndrome, rheumatoid arthritis, lupus and ankylosing spondylitis [21], suggesting that undetected or preclinical joint inflammation may contribute to ANA positivity.

How do you read titer results?

The greater the concentration of the specific antibody in the serum sample, the higher the titer. For example, a titer for an influenza hemagglutination inhibition assay of 1:10 would be very low; a titer of 1:320 would be high. A low or undetectable titer indicates very little antibody present in the serum.

How do you rule out lupus?

No one test can diagnose lupus. The combination of blood and urine tests, signs and symptoms, and physical examination findings leads to the diagnosis.

Which is worse Sjogren's or lupus?

The prognosis with SS is generally better than that of other autoimmune diseases such as lupus. Patients with just exocrine gland involvement do not appear to have increased mortality.

What ANA pattern is most common?

The most frequent ANA patterns were coarse speckled pattern (154 patients, 31.2%), nucleolar pattern (89 patients, 18.0%), fine speckled pattern (57 patients, 11.5%), and speckled pattern (48 patients, 9.7%).

Does ANA titer change?

ANA titers may increase and decrease over the course of the disease; these fluctuations do not necessarily correlate with disease activity.

Is it common to have a positive ANA?

At a dilution of 1:160, only 5 percent of normal individuals have a positive test for ANA. The 1:160 dilution increases the specificity of the ANA test for the diagnosis of autoimmune diseases.

Does fibromyalgia cause positive ANA?

Most of the false-positive ANAs were of low titer, but even a high-titer ANA is not proof of an underlying connective tissue disease. Therefore, not surprisingly, ANA testing is frequently positive in patients with fibromyalgia.

Can low vitamin D cause positive ANA?

Vitamin D deficiency may contribute to immune dysregulation resulting in the production of autoantibodies, in particular antinuclear antibodies (ANA) (6, 7).

How do you read an ANA titer?

The higher the titer, the more likely the result is a “true positive” result, meaning you have significant ANAs and an autoimmune disease. For example, for a ratio of 1:40 or 1:80, the possibility of an autoimmune disorder is considered low.