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Test Name:
Influenza Virus A IgM Antibody
- SBMF No:
44503 - Performance Lab Name:
ARUP Laboratories - Test Mnemonic:
FLUA M - ABN:
Not required - CPT Code:
86710 - LOINC Code:
31438-5 - Ref Lab Test No:
0051081 - Also Known As:
Flu A, IgM - Spec Type:
Serum - Spec Container:
Gold top (SST) or red top (serum) tube - Pref Vol:
1.0 mL - Min Vol:
0.05 mL - Fasting:
No - Spec Collect:
Routine venipuncture
Parallel testing is preferred
Label samples as: "acute" or "convalescent"
Convalescent samples must be received within 30 days from receipt of acute samples - Spec Process:
Clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum to separate plastic tube - Spec Store Transport:
Refrigerated - Spec Stability:
After separation from cells:
2 days room temperature (20-30°C)
2 weeks refrigerated (2-8°C)
1 year frozen (-20°) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Spec Reject:
Plasma sample
Hemolyzed, lipemic, icteric, turbid, bacterially contaminated, or heat-inactivated sample - Methodology:
Semi-Quantitative Enzyme-Linked Immunosorbent Assay (ELISA) - Clinical Significance:
Refer to:
- Reference Range:
0.89 IV or less: Negative - No significant level of influenza A virus IgM antibody detected.
0.90-1.10 IV: Equivocal - Questionable presence of influenza A virus IgM antibody detected. Repeat testing in 10-14 days may be helpful.
1.11 IV or greater: Positive - IgM antibodies to influenza A virus detected, which may suggest current or recent infection. - Day Run:
Mon, Wed, Fri - Time Reported:
2-7 days - Test Type:
INFECTIOUS ANTIBODY
