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Test ID POWVC Powassan Virus, RNA, Molecular Detection, PCR, Spinal Fluid

Ordering Guidance

The Powassan virus polymerase chain reaction result may remain positive for a longer time in urine than in blood, serum, and cerebrospinal fluid (7 days or more).

Specimen Required

Container/Tube: Sterile vial

Specimen Volume: 1 mL

Collection Instructions:

1. Send specimen from collection vial 2.

2. Do not centrifuge or heat inactivate.

Useful For

Rapid testing for Powassan virus RNA (lineage 1 and lineage 2) using cerebrospinal fluid specimens


An adjunctive test to serology for detection of early Powassan virus infection (ie, first few days after symptom onset)


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

Testing Algorithm

For more information see Meningitis/Encephalitis Panel Algorithm.

Method Name

Real-Time Polymerase Chain Reaction (PCR)

Reporting Name

Powassan Virus, PCR, CSF

Specimen Type


Specimen Minimum Volume

0.3 mL

Specimen Stability Information

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

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
POWVC Powassan Virus, PCR, CSF 34457-2


Result ID Test Result Name Result LOINC Value
617489 Lineage 1 34457-2
618145 Lineage 2 (Deer Tick Virus) 34457-2
618149 Powassan Virus PCR Comment 77202-0


If not ordering electronically, complete, print, and send a Microbiology Test Request (T732) with the specimen.