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The kinetoplast fluoresces if serum contains high avidity anti-dsDNA antibodies. This test has a higher specificity than EIA because it uses unprocessed DNA. Processed DNA can contain regions of ssDNA, allowing detection of anti-ssDNA antibodies, which can give false positive results. [1] [28]
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Anti-double stranded DNA (anti-dsDNA) antibodies are highly associated with SLE. They are a very specific marker for the disease, with some studies quoting nearly 100%. [8] Data on sensitivity ranges from 25 to 85%. Anti-dsDNA antibody levels, known as titres, correlate with disease activity in SLE; high levels indicate more active lupus.
Immunofluorescence (IF) on ethanol-fixed neutrophils is used to detect ANCA, although formalin-fixed neutrophils may be used to help differentiate ANCA patterns. ANCA can be divided into four patterns when visualised by IF; cytoplasmic ANCA (c-ANCA), C-ANCA (atypical), perinuclear ANCA (p-ANCA) and atypical ANCA (a-ANCA), also known as x-ANCA. c-ANCA shows cytoplasmic granular fluorescence ...
Anti-DNase B antibody titers also stay elevated for longer, which is useful since often ASO titers may rise, but then fall prior to the onset of the glomerulonephritis where the onset of disease is often greater than 2 weeks after the infection resolved.
The discrepancy can be resolved by testing the person's red blood cells with an anti-A 1 reagent, which will give a negative result if the patient belongs to the A 2 subgroup. Anti-A 1 antibodies are considered clinically insignificant unless they react at 37 °C (99 °F). Other subgroups of A exist, as well as subgroups of B, but they are ...
A 2002 paper also seeks to compare the diagnostic tests used in immunology laboratories to measure anti-ENAs and ways to improve this testing and reporting. Double immunodiffusion (DID) and counterimmunoelectrophoresis (CIEP), two forms of gel-based techniques , are used to gain information on the clinical significance and the role of these ...
Anti Scl-70 antibodies (also called anti-topoisomerase I after the type I topoisomerase target [1]) is a type of antinuclear autoantibody seen mainly in diffuse systemic scleroderma, but is also seen the more limited form of systemic scleroderma called CREST syndrome. [2]