Casandra
Casandra Test Code QD21948Version 1 (DRAFT)
Performing Lab
DNA (DS) Antibody, Crithidia IFA with Reflex to Titer
Also known as: Crithidia Luciliae Substrate Assay, Double Stranded DNA Antibody, Native DNA Antibody
Clinical Use
Order TestUse
The double-stranded DNA (dsDNA) antibody detected by the Crithidia luciliae immunofluorescence assay (IFA) is clinically significant in patients with active systemic lupus erythematosus (SLE) and approximately 20% of patients with mixed connective tissue disease. A positive screening result triggers reflex testing for titer at an additional charge.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Immunoassay (Indirect Immunofluorescence)
Biomarkers
2 components
Crithidia IFA Screen • Indirect ImmunofluorescenceCrithidia IFA Titer Reflex • Indirect Immunofluorescence
Result Turnaround Time
1-4 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.2 mL
Container
Red Top (No Additive)
Collection Instructions
Overnight fasting is preferred.
Patient Preparation
Overnight fasting is preferred.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 16 days |
| Frozen | 35 days |