Laboratory: Clinical Immunology
Test Name:
SSA (RO) ANTIBODY -EXTRACTABLE NUCLEAR ANTIGEN - (S)
Test Code: SSA
Clinical Information:

Test performed at St. Boniface Hospital Immunology Lab using a multiplex method.  SSA (Ro) (52,60) is found in patients with connective tissue diseases, most commonly Sjogren’s Syndrome, Lupus Erythematosus (SLE), and rheumatoid arthritis.  SSA (Ro) antibodies are also associated with pediatric lupus and heart block in infants born to mothers with SLE.
 

Collection Devices:
Specimen Required:
Blood: 5.0 mL


Serum: 1.0 mL
Referral:
Serum: 1.0 mL

Separate serum; store and ship serum aliquot refrigerated.  Do NOT freeze.

Requisition:
Reference Values:

Negative = 0 - 0.9 AI

A negative result does not necessarily exclude autoimmune disease.  Positive results should not be interpreted in isolation and must be correlated with relevant clinical findings.

Availability:
Within 5 Days
See Also:
More Information:

SSA is included in the ANA Screen and ENA tests.  This test is useful if there is a clinical scenario of connective tissue disease and the ANA screen test is positive.