Rubella IgM Antibody
Test Mnemonic
RUBIGM
CPT Codes
- 86762 - QTY (1)
LOINC ®
5335-5
Aliases
- German Measles IgM Antibody
Includes
- Rubella Antibody IgM
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Refrigerated | Separate from cells ASAP or within 2 hours of collection and transfer serum to standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: 48 hours |
| Refrigerated | After separation from cells: 2 weeks |
| Frozen | After separation from cells: 1 year (Avoid repeated freeze/thaw cycles) |
Days Performed
Sun - Sat
Turnaround Time
1 - 2 days
Methodology
| Name | Description |
|---|---|
| Semi-Quantitative Chemiluminescent Immunoassay |
Reference Range
| Rubella IgM | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| 19.9 AU/mL or less: Not Detected | 20.0 - 24.9 AU/mL: Indeterminate - Repeat testing in 10-14 days may be helpful | 25.0 AU/mL or greater: Detected - IgM antibody to rubella detected, which may indicate a current or recent infection or immunization |
Special Info
Acute and convalescent specimens must be labeled as such; parallel testing is preferred, and convalescent specimens must be received within 30 days from receipt of acute specimens. Please label specimen plainly as 'acute' or 'convalescent'. Contaminated, heat-inactivated, or grossly hemolyzed specimens are unacceptable. This test is New York DOH approved.
Clinical Info
Not recommended as a stand-alone test. Testing immediately post-exposure is of no value without a later convalescent specimen. While the presence of IgM antibodies suggests current or recent infection, low levels of IgM antibodies may occasionally persist for more than 12 months post-infection or immunization. The magnitude of the measured result is not indicative of the amount of antibody present.