Anti-La (SS-B) Ab (RDL)
Also known as: La Ab, SSB Ab
Use
Autoantibodies to La/SS-B antigen are detected by enzyme immunoassay in 70% to 90% of primary and about 50% of secondary Sjorgen's syndrome as well as 30% of SLE and 80% of subacute cutaneous lupus and a majority of infants with complete heart block.
Special Instructions
Not provided.
Limitations
The test may not detect all cases of disease in which autoantibodies to La/SS-B antigen may be present. The presence of these antibodies can be indicative of various autoimmune disorders, but the test alone cannot diagnose a condition. Interpretation should be made considering clinical findings and results of other tests.
Methodology
Immunoassay (ELISA)
Biomarkers
La/SS-B antigen
Protein
LOINC Codes
- 45142-7 - ENA SS-B Ab Ser IA-aCnc
- 45142-7 - ENA SS-B Ab Ser IA-aCnc
Result Turnaround Time
5-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.3 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Separate serum from cells within one hour of collection. Transfer to a plastic transport tube before shipping.
Storage Instructions
Refrigerate or freeze.
Causes for Rejection
Grossly hemolyzed; bacterial contamination; lipemic specimen; icteric specimen; non-serum specimen types
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 60 days |
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