Do not use to diagnose acute influenza infections. Serological testing for influenza should be used for research and public health investigations only.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Mon, Wed, Fri
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.05 mL) 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."
Refrigerated. Also acceptable: Room temperature or frozen.
Plasma. Bacterially contaminated, heat-inactivated, hemolyzed, icteric, lipemic, turbid specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year
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.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0051081||Influenza A Virus Antibody IgM||31438-5|
- Flu A
- Flu A IgM