Casandra
Casandra Test Code QD61260Version 1 (DRAFT)
Performing Lab
Lab Quest DiagnosticsLab Test ID 19583
Cytomegalovirus IgG Avidity, ELISA
Also known as: Avidity, CMV IgG Avidity Index
Clinical Use
Order TestUse
The CMV IgG avidity assay is used for distinguishing between recent (primary) and past cytomegalovirus infection, particularly crucial in pregnant women to assess the risk of intrauterine transmission. In cases where both CMV IgG and IgM are positive, avidity testing helps clarify whether the infection occurred before or after conception, which has important implications for fetal risk assessment.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Immunoassay (ELISA)
Biomarkers
CMV IgG Avidity Index
AnalyteAvidity Index
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
Transport tube
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 30 days |
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