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HelpTest Code CRITH DNA Double-Stranded (dsDNA) Antibodies by Crithidia luciliae IFA, IgG, Serum
Reporting Name
dsDNA Ab by Crithidia IFA, IgG, SSpecimen Type
SerumSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.3 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 21 days | |
| Frozen | 21 days |
Reference Values
Negative
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
86255
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CRITH | dsDNA Ab by Crithidia IFA, IgG, S | 58466-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 62925 | dsDNA Ab by Crithidia IFA, IgG, S | In Process |
| 37268 | Crithidia Interpretation | 69048-7 |
Method Name
Indirect Immunofluorescence
Useful For
Confirmation testing for dsDNA IgG antibodies in patients with clinical features of systemic lupus erythematosus or at-risk for disease
This test should not be used independently for monitoring treatment response or establishing remission.
Interpretation
A positive result for double-stranded DNA (dsDNA) IgG antibodies in the appropriate clinical context is highly suggestive of systemic lupus erythematosus (SLE). The presence of dsDNA IgG antibodies detected using the Crithidia luciliae indirect immunofluorescence test is highly specific for SLE with moderate sensitivity.
A negative result does not exclude a diagnosis of SLE.
Clinical Reference
1. Aringer M, Costenbader K, Daikh D, et al. 2019 European League Against Rheumatism/American College of Rheumatology Classification Criteria for systemic lupus erythematosus. Arthritis Rheumatol. 2019;71(9):1400-1412. doi:10.1002/art.40930
2. Petri M, Orbai AM, Alarcon GS, et al. Derivation and validation of the Systemic Lupus International Collaborating Clinics classification criteria for systemic lupus erythematosus. Arthritis Rheum. 2012;64(8): 2677-2686. doi:10.1002/art.34473
3. Enocsson H, Sjowall C, Wirestam L, et al. Four anti-dsDNA antibody assays in relation to systemic lupus erythematosus disease specificity and activity. J Rheumatol. 2015;42(5):817-825. doi:10.3899/jrheum.140677
4. Sarbu MI, Salman-Monte TC, Munoz PR, Lisbona MP, Bernabe MA, Carbonell J. Differences between clinical and laboratory findings in patients with recent diagnosis of SLE according to the positivity of anti-dsDNA by the Crithidia luciliae method. Lupus. 2015;24(11):1198-1203. doi:10.1177/0961203315573852
5. Rekvig OP. Autoimmunity and SLE: factual and semantic evidence-based critical analyses of definitions, etiology, and pathogenesis. Front Immunol. 2020;11:569234. doi:10.3389/fimmu.2020.569234
6. Damoiseaux J, Andrade LEC, Carballo OG, et al. Clinical relevance of HEp-2 indirect immunofluorescent patterns: the International Consensus on ANA patterns (ICAP) perspective. Ann Rheum Dis. 2019;78(7):879-889. doi:10.1136/annrheumdis-2018-214436
7. Bragazzi NL, Watad A, Damiani G, Adawi M, Amital H, Shoenfeld Y. Role of anti-DNA auto-antibodies as biomarkers of response to treatment in systemic lupus erythematosus patients: hypes and hopes. Insights and implications from a comprehensive review of the literature. Expert Rev Mol Diagn. 2019;19(11):969-978. doi:10.1080/14737159.2019.1665511
8. Fox BJ, Hockley J, Rigsby P, Dolman C, Meroni PL, Ronnelid J. A WHO Reference Reagent for lupus (anti-dsDNA) antibodies: international collaborative study to evaluate a candidate preparation. Ann Rheum Dis. 2019;78(12):1677-1680. doi:10.1136/annrheumdis-2019-215845
9. Choi MY, Clarke AE, St Pierre Y, et al. Antinuclear antibody-negative systemic lupus erythematosus in an international inception cohort. Arthritis Care Res (Hoboken). 2019;71(7):893-902. doi:10.1002/acr.23712
Day(s) Performed
Monday through Friday
Report Available
2 to 4 daysSpecimen Minimum Volume
See Specimen Required