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Rubella Antibody, IgM
Ordering Recommendation
Not recommended as a stand-alone test. Rubella Antibodies, IgG and IgM (0050552) is preferred.
New York DOH Approval Status
Specimen Required
Serum Separator Tube (SST).
Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of acute specimens.
Refrigerated.
Contaminated, heat-inactivated, or grossly hemolyzed specimens.
Label specimens plainly as acute or convalescent.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (Avoid repeated freeze/thaw cycles)
Methodology
Semi-Quantitative Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
Reference Interval
| 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. |
Interpretive Data
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.
FDA
Note
Hotline History
CPT Codes
86762
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0050551 | Rubella Antibody IgM | 5335-5 |
Aliases
- Rubella Ab, IgM
- Rubella Antibody IgM
- Rubella serology
