Sign in →

Test Code WNVUR West Nile Virus, RNA, PCR, Molecular Detection, Random, Urine

Specimen Required

Container/Tube: Sterile container

Specimen Volume: 1 mL

Collection Instructions:

1. Collect random urine in a sterile container.

2. Label specimen as urine.

Useful For

Rapid testing for West Nile virus (WNV) RNA (lineage 1 and lineage 2)


An adjunctive test to serology for detection of early WNV infection (ie, first few days after symptom onset). The WNV polymerase chain reaction result may remain positive for a longer time in urine than in blood, serum, and cerebrospinal fluid (7 days or more).


This assay should not be used for screening asymptomatic individuals and should only be used to test patients with signs and symptoms of WNV disease.

Testing Algorithm

The following algorithms are available in Special Instructions:

-Meningitis/Encephalitis Panel Algorithm

-Mosquito-borne Disease Laboratory Testing

Method Name

Real-Time Polymerase Chain Reaction (PCR)

Reporting Name

West Nile Virus RNA, PCR, Urine

Specimen Type


Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reject Due To

Samples that have been heat inactivated
Urine containing preservatives

Reference Values


Day(s) Performed

Monday through Friday

Report Available

Same day / 1 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
WNVUR West Nile Virus RNA, PCR, Urine 97185-3


Result ID Test Result Name Result LOINC Value
608437 West Nile Virus RNA, PCR, Urine 97185-3