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Test Name:
Influenza B Virus Antibodies, IgG and IgM


  • TMF No:
    45774
  • Performance Lab Name:
    ARUP Laboratories
  • Test Mnemonic:
    FLUB PAN
  • CPT Code:
    86710x2
  • Ref Lab Test No:
    2004422
  • Also Known As:
    Flu B
  • Spec Collect:
    Gold top (SST) or Red top (serum) tube. Mix by inverting tube 5 times.
  • Spec Process:
    Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to a screw-capped plastic transport tube. (Min: 0.2 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days of receipt of the acute specimens. Mark specimens plainly "acute" and "convalescent."
  • Spec Store Transport:
    Refrigerated.
  • Spec Stability:
    After separation from cells:
    Room temperature: 48 hours
    Refrigerated: 2 weeks
    Frozen: 1 year
  • Spec Reject:
    Plasma. Bacterially contaminated, heat-inactivated, hemolyzed, icteric, lipemic, or turbid specimens.
  • Methodology:
    Semi-Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)
  • Interpretive Data:

    Influenza B Virus Antibody, IgG
    0.89 IV or less: Negative - No significant level of influenza B virus IgG antibody detected.
    0.90-1.10 IV: Equivocal - Questionable presence of influenza B virus IgG antibody detected. Repeat testing in 10-14 days may be helpful.
    1.11 IV or greater: Positive - IgG antibodies to influenza B virus detected, which may suggest current or past infection.

    Influenza B Virus Antibody, IgM
    0.89 IV or less: Negative - No significant level of influenza B virus IgM antibody detected.
    0.90-1.10 IV: Equivocal - Questionable presence of influenza B virus IgM antibody detected. Repeat testing in 10-14 days may be helpful.
    1.11 IV or greater: Positive - IgM antibodies to influenza B virus detected, which may suggest current or recent infection.

  • Day Run:
    Mon, Wed, Fri
  • Time Reported:
    2-7 days
  • Test Type:
    INFECTIOUS ANTIBODY