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Test Code LAB8610 Cytomegalovirus IgM Antibody

Test Name Alias

Cytomegalovirus IgM | CMV IgM | Torch | ToRC

Clinical Information

Intended as an aid in the diagnosis of current or recent Cytomegalovirus infection.

Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: 5.0 mL

Minimum Volume to Collect: 2.0 mL

Neonate Volume to Collect: 2.0 mL

Capillary collect ok: Yes

Microtainer acceptable: Yes

Collection Instructions:

  • After collection, gently invert tube 8-10 times.
  • Specimen should be processed within 2 hours – See Processing Instructions.

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Processed Specimen: Serum

Centrifuge/Spin: Yes

Aliquot: No

Minimum Serum Volume: 1.0 mL

Processing Instructions:

  • Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Rejection Criteria

Specimen not centrifuged within 2 hours.

Specimen Stability

Ambient: 3 days

Refrigerate: 7 days

Frozen: aliquot serum for longer storage at-20C or colder

Laboratory Retention: 7 days

Test Frequency

Available Monday through Friday usual TAT 1-3 days.

Reference Range


Results Interpretation

Results Interpretation
Negative CMV IgM Antibody was not detected
Equivocal Equivocal results: CMV IgM status not determined. Obtain an additional sample within an appropriate timeframe (collect in 2-3 weeks) for re-testing
Positive CMV IgM antibody detected which may indicate a current or recent infrection.


Performing Department


Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI


Multiplex Flow Immunoassay



CDM Code


Epic Test ID


Interface Order Alias



CMV Ab IgM: 24119-0

Mayo Access Code


Reviewed Date