Home
HelpTest Code CMGA Cytomegalovirus (CMV) IgG Avidity Testing
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII) / Red Top
Volume: 5.0 mL / 6.0 mL blood
Minimum Volume: 1.0 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs
Specimen Stability
| Specimen type | Serum |
|---|---|
| Ambient | 3 days |
| Refrigerate | 2 weeks (preferred) |
| Frozen | 1 year |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
Monday, Wednesday, Friday, TAT 2 - 4 days
Reference Interval
< 50.0% Avi: Low Avidity
50.0 – 59.9% Avi: Grayzone
≥ 60.0% Avi: High Avidity
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
To aid in the diagnosis of cytomegalovirus (CMV) infection during pregnancy after initial testing for CMV IgM and IgG has been performed.
Service Code
31862
Update
Last updated 21/02/2025
Alias
Cytomegalovirus Antibody
IgG Avidity
Laboratory Code
LAB467
LOINC Code Information
| Cytomegalovirus antibody, IgG | 13949-3 |
|---|---|
| Cytomegalovirus antibody, IgM | 24119-0 |
| Cytomegalovirus (CMV) IgG Avidity | 78445-4 |