| Test: | Mumps Virus Antibody, IgM |
| Synonym: | Mumps Virus Serology |
| Method: | Enzyme-Linked Immunosorbent Assay |
| Availability: | Monday, Wednesday, Friday; results 1 to 6 days |
| Specimen: | Blood |
| Collection Device: | One 6.0 mL Clot (Red) or one 6.0 mL SST (Gold) tube |
| Volume: | 1 - 4 mL blood (0.5 - 2.0 mL serum) |
| Storage/Transport: | Separate serum from the cells ASAP. Transport and store refrigerated, and if transport > 48 hours, aliquot and freeze. |
| Unacceptable: | Severely lipemic, icteric or hemolyzed samples; heat-activated serum; multiple freeze thaw cycles |
| Specimen Stability: | After separation from cells: ambient, < 8 hours; refrigerated, 48 hours; frozen, 1 year |
| Reference Interval: | ≤ 0.79 IV: NEGATIVE - No significant level of detectable IgM antibody to Mumps virus 0.80 - 1.20 IV: EQUIVOCAL - Borderline levels of IgM antibody to Mumps virus. Repeat testing in 10-14 days recommended. ≥ 1.21 IV: POSITIVE - Presence of IgM antibody to Mumps virus detected which may indicate a current or recent infection. |
| Reportable Disease: | A positive result is reportable |
| Comments: | While the presence of IgM antibodies suggests current or recent infection, low levels of IgM antibodies may occasionally persist for > 12 months post infection or immunization. |
| Revised: | 7/6/2011 |