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Rubella Antibody, IgM
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Ordering Recommendation
Not recommended as a stand-alone test. Rubella Antibodies, IgG and IgM (0050552) is preferred.
Mnemonic
Methodology
Semi-Quantitative Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
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)
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
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