Mumps Antibody IgM (Sendout)

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General Information

Lab Name
Lab Code
644
External Test Id
0099589
Description

Useful For: Laboratory diagnosis of mumps virus infection.

Ordering Notes:

  • Review by the King County Public Health epidemiologist (206-296-4774) is recommended before ordering IgM serology for suspected acute mumps infection.
  • Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."
  • To determine Mumps immune status, refer to test Mumps Immune Status [MPIS].

***Ordering Note: Effective 04/21/2025: The test previously sent to Mayo Clinic Laboratories is offline due to reagent backorder. Samples will be sent to ARUP Laboratories for Mumps Virus Antibody IgM until testing resumes at Mayo. The expected downtime is approximately 3 weeks.***

Synonyms
0099589, MMPM, Mumps IgM, Mumps Serology
Components

Interpretation

Guidelines
Method

Semi-Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)

Reference Range
Ref. Range Notes

Reference Interval:

0.79 IV or less: 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 may be helpful.
1.21 IV or greater: Positive - Presence of IgM antibody to Mumps virus detected, which may indicate a current or recent infection. However, low levels of IgM antibody may occasionally persist for more than 12 months post-infection or immunization.
Interferences and Limitations

Cautions:

Results must always be interpreted together with other clinical and laboratory findings.

Serum specimens drawn during the acute phase of infection may be negative by serological tests.

All positive results must be interpreted with care, as some false-positive results or heterotypical responses of the IgM have been seen in the serum of pregnant women or in patients with an acute infection caused by cytomegalovirus, herpes simplex virus, measles, rubella, and parvovirus.

Ordering & Collection

Specimen Type
Blood
Collection

3 mL blood in GOLD SST or RED TOP tube

Handling Instructions

Outside Laboratories: Centrifuge sample and transfer serum to a separate plastic vial. Refrigerate serum.

Stability: Refrigerated (preferred): 2 weeks; Frozen: 1 year; Ambient: 48 hours.

Reject Due To: Bacterially contaminated, heat-inactivated, hemolyzed, icteric, lipemic, or turbid specimens.

Quantity
Requested: 1 mL serum
Minimum: 0.2 mL serum

Processing

Receiving Instructions

Centrifuge sample and transfer serum to a separate plastic vial. Refrigerate serum.

Sendouts:

  • Order ARUP Test: 0099589
  • Interfaced: Yes [Interface: 602; Department: ARPR]

Stability: Refrigerated (preferred): 2 weeks; Frozen: 1 year; Ambient: 48 hours.

Reject Due To: Bacterially contaminated, heat-inactivated, hemolyzed, icteric, lipemic, or turbid specimens.

Misc Sendout

Performance

Lab Department
Frequency
Performed: Monday through Friday. Report Available: 1-5 days from sample receipt at ARUP Laboratories.
Available STAT?
No
Performing Location(s)
Sendout ARUP Laboratories, Inc.
800-522-2787

500 Chipeta Way
Salt Lake City, UT 84108

Billing & Coding

Billing Comments

CPT: 86735