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  2. Antinuclear antibody - Wikipedia

    en.wikipedia.org/wiki/Antinuclear_antibody

    An ANA test is considered positive if fluorescence is seen at a titre of 1:40/1:80. Higher titres are more clinically significant as low positives (≤1:160) are found in up to 20% of healthy individuals, especially the elderly. Only around 5% of the healthy population have ANA titres of 1:160 or higher. [8] [53]

  3. Extractable nuclear antigen - Wikipedia

    en.wikipedia.org/wiki/Extractable_nuclear_antigen

    Indeed, in 84.3% of positive anti-ENA samples, ANA reagents were also found. [1] The use of anti-ENA autoantibody tests can serve as additional verification of an autoimmune disorder, because a positive ANA test alone does not suffice for diagnosis. In fact, low levels of ANAs can be found in healthy patients.

  4. Anti-dsDNA antibodies - Wikipedia

    en.wikipedia.org/wiki/Anti-dsDNA_antibodies

    Titres are monitored more often in cases of more active lupus than that of less active lupus at intervals of 13 months and 6–12 months, respectively. [1] Anti-dsDNA antibodies are highly associated with glomerulonephritis in SLE, although some patients with high titers of anti-dsDNA antibodies do not develop renal disease. This is most ...

  5. Anti-Scl-70 antibodies - Wikipedia

    en.wikipedia.org/wiki/Anti-Scl-70_antibodies

    Anti-Scl-70 (also called anti-topoisomerase I after the type I topoisomerase target [1]) is an anti-topoisomerase antibody-type of anti-nuclear autoantibodies, seen mainly in diffuse systemic scleroderma (with a sensitivity of 28–70%), but is also seen in 10–18% of cases of the more limited form of systemic scleroderma called CREST syndrome. [2]

  6. Rapid plasma reagin - Wikipedia

    en.wikipedia.org/wiki/Rapid_plasma_reagin

    The rapid plasma reagin test (RPR test or RPR titer) is a type of rapid diagnostic test that looks for non-specific antibodies in the blood of the patient that may indicate an infection by syphilis or related non-venereal treponematoses.

  7. Quest Diagnostics is rolling out the first antibody test for ...

    www.aol.com/quest-diagnostics-rolling-first...

    Quest Diagnostics is letting people sign up for antibody tests for the novel coronavirus online. Starting today, people in the US can order the tests on Quest's consumer testing site without ...

  8. Anti-neutrophil cytoplasmic antibody - Wikipedia

    en.wikipedia.org/wiki/Anti-neutrophil_cytoplasm...

    [3] [7] The ANCA-positive rate is much higher in patients with type 1 diabetes mellitus than in healthy individuals. [8] Levamisole, which is a common adulterant of cocaine, can cause an ANCA positive vasculitis. [9] The presence or absence of ANCA cannot indicate presence or absence of disease and results are correlated with clinical features.

  9. Complement fixation test - Wikipedia

    en.wikipedia.org/wiki/Complement_fixation_test

    If this reaction occurs on a cell surface, it will result in the formation of trans-membrane pores and therefore destruction of the cell. The basic steps of a complement fixation test are as follows: [1] Serum is separated from the patient. Patients naturally have different levels of complement proteins in their serum.