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:
Special Instructions
Method Name
Real-Time Polymerase Chain Reaction (PCR)
Reporting Name
West Nile Virus RNA, PCR, UrineSpecimen Type
UrineSpecimen 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 |
Reject |
Reference Values
Negative
Day(s) Performed
Monday through Friday
Report Available
Same day / 1 to 5 daysPerforming Laboratory

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
87798
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 |
Forms
If not ordering electronically, complete, print, and send a Microbiology Test Request (T244) with the specimen.