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Rubella IgM - RRPL

Discipline

Microbiology

Overview

Description

  • Rubella is a viral illness characterized by a maculopapular rash, fever, and lymphadenopathy.  Transmission typically occurs via droplet or direct contact with nasopharyngeal secretions.

  • Rubella infection during pregnancy presents substantial risk to the developing fetus.

  • The presence of rubella-specific IgM indicates acute or recent rubella infection.

Ordering recommendations

  • Patients suspected of acute Rubella infection

  • NOTE: IgM should only be requested on symptomatic patients.

Specimen Information

Specimen types accepted

  • Serum

Specimen collection container

  • Serum separator tubes (SST; Tiger top or Gold top)

Collection procedure

  • Serum (SST): Collect blood in serum separator vacutainer (SST). Centrifuge. Aliquot.

Required volume

  • 1mL (minimum)

Transport and stability

  • Serum may be shipped at ambient temperature.

Performance

Methodology

  • Qualitative chemiluminescence immunoassay from DiaSorin (Positive/Indeterminate/Negative).

  • NOTE: Results should be interpreted in conjunction with clinical symptoms, exposure, and vaccination history.

Days/times performed

  • All specimens will be tested at RRPL.

Maximum laboratory time

  • Turn-around-time of 3 days from receipt in lab.

  • Positive Rubella IgM results are reported to a Medical Health Officer.

  • NOTE: Specimens positive for Rubella IgM will automatically receive Rubella IgG testing.

Specimen retention time

  • Specimens retained for 10 days after testing.

Last Updated: October 24, 2025