Laboratory Services

Influenza A+B Antigen

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Updated Test Information:

Test Description
Influenza A+B Antigen

Rapid Flu, Influenza A + B, Flu A, Flu B, Rapid Flu

Test ID
General Information

Rapid Detection of Flu A+B by rapid chromatographic immunoassay. The Influenza A+B FIA employs immunofluorescence to detect influenza A and influenza B viral nucleoprotein antigens from the nasopharyngeal swab.

Container Type

NP/Nasal swab:  Submit swab in 1 mL saline
Nasopharyngeal wash:  Submit sample in sterile container

Specimen Type

Preferred: Nasopharyngeal swab, Nasopharyngeal wash or aspirate.
Will also accept: Nasal swab

Specimen Collection / Processing Instructions

Break swab into saline tube. Refrigerate.

Additional Processing Details

Refrigerate for up to 24 hours

Collection File View/Download File

Room temp: 4 hours
Refrigerated: 24 hours

Unacceptable Specimen Conditions

Frozen, incorrect transport media, delayed in transport

Department (code)



Chromatographic immunoassay

Estimated TAT

4-24 hours

Testing Schedule


Test Includes

Flu A Antigen Flu B Antigen

CPT Code(s)

87804, 87804-59

Minimum Sample Volume

Saline 1mL

Reference Range


Performing Lab

Incyte Diagnostics

LOINC Code(s)

33535-6, 68966-1