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Test Code LAB3326 Influenza Virus Type A and Type B, and Respiratory Syncytial Virus (RSV), Molecular Detection, PCR, Nasopharyngeal Swab

Additional Codes

Mayo Test Code: FLUNP

Useful For

Rapid and accurate detection of influenza A, influenza B, and respiratory syncytial virus in a single test for nasopharyngeal swab specimens

Reporting Name

Influenza A/B and RSV, PCR, NP Swab

Specimen Type


Specimen Required


Nasopharyngeal Swab (Rayon Mini-Tip Swab) (T515)

M4-RT (T605)

Specimen Type: Nasopharyngeal swab

Container/Tube: Sterile container with viral transport media

Collection Instructions:

1. Collect specimen by swabbing back and forth over mucosa surface to maximize recovery of cells.

2. Swab must be placed in viral transport media (for example, M4-RT (T605), M4, or M4 media).

Specimen Minimum Volume

Nasopharyngeal swab submitted in minimum volume of 0.3 mL of viral transport media (eg, M4-RT)

Specimen Stability Information

Specimen Type Temperature Time
Varies Refrigerated (preferred) 7 days
  Frozen  7 days

Reject Due To








E-swab, calcium alginate-tipped swab, wood swab, dry swab, or transport swab containing gel

Reference Values


Day(s) and Time(s) Performed

Monday through Sunday

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FLUNP Influenza A/B and RSV, PCR, NP Swab In Process


Result ID Test Result Name Result LOINC Value
SS019 Specimen Source 31208-2
35975 Influenza A, PCR 76078-5
35976 Influenza B, PCR 76080-1
35977 Respiratory Syncytial Virus, PCR 76089-2

Method Name

Multiplex Real-Time Polymerase Chain Reaction (RT-PCR)


If not ordering electronically, complete, print, and send a Microbiology Test Request Form (T244) with the specimen (