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Influenza A Virus Antibody, IgM

ARUP #51081, EPIC: LAB6282, SOFT: XIFAM

Test Codes

ARUP #51081, EPIC: LAB6282, SOFT: XIFAM

Instructions

Acute and convalescent samples must be labeled as such; parallel testing is preferred and convalescent samples must be received within 30 days from receipt of the acute samples. Please mark sample plainly as "acute" or "convalescent".

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.05 mL)

Rejection Criteria

• Hemolyzed specimens.
• Icteric specimens.
• Lipemic specimens.
• Turbid specimens.
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.05 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 48 hours
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 1 year

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.

Laboratory

Sent to ARUP Laboratories, Salt Lake City, UT.

Performed

Monday, Wednesday, Friday.
Results available in 2-7 days.

Reference Range

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

Test Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay.

Clinical Utility

The presence of Influenza A IgM antibody indicates recent infection.

CPT Codes

86710

Contacts

Last Updated

10/23/2019