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 Field Name  Data Description
Test Name  West Nile Virus RT PCR.
Code  West Nile Virus RT PCR.
CPT Code  87798
Last Modified  5/1/2018 10:11:00 AM
Test Name  West Nile Virus RT PCR.
Synonyms  NGI, WNV RT, Ultraq, Wnv, Rtpcr, Nile, West, UltraQual RT-PCR
Patient Preparation  
Spec. Requirements  Blood or CSF
Tube  Gold, Yellow-top (ACD), Lavender-top (EDTA) or Plasma Preparation Tube (PPT(TM))
Collection Volume  Gold 3.5 mL, Lavender-top (EDTA) 2.0 mL, Yellow-top (ACD) 8.5 mL, or Plasma Preparation Tube (PPT) 5.0 mL
Storage  Freeze
Routine TAT  
Days Test Performed  
Performed by BHS  None
See Availability  
Reference Lab  LabCorp of America
Reference Lab Code  140005 NGI West Nile Virus RT PCR
Clinical Use  Detect West Nile Virus (WNV) RNA. The direct detection of WNV is a valuable tool in determining whether a patient is infected with West Nile Virus. It is also useful in determining whether blood and blood products are free of detectable WNV prior to distribution. PCR is able to directly detect WNV RNA and does not rely on antibody markers of WNV infection, which are produced after RNA is detectable in newly infected individuals.
Reference Range  
Critical Value  
Testing Sample Type  Plasma, Serum or CSF
Min Lab Testing Volume  2.5 mL
Special Handling  
Lab Notes  Collection: Collect blood in gel-barrier tube, yellow-top (ACD) tube, lavender-top (EDTA) tube OR plasma preparation tube (PPT(TM)). Centrifuge blood at 800-1600xg at room temperature within one hour of draw to separate serum/plasmafrom cells. Transfer serum/plasma to a plastic screw-capped transport tube and freeze. Specimens drawn into PPT(TM) needto be centrifuged in a swinging bucket rotor centrifuge within one hour and frozen. Ship frozen. To avoid delays in avoid delays in turnaround time when requesting multiple tests on frozen samples, PLEASE SUBMIT SEPARATE FROZEN SPECIMENS FOR EACH TEST REQUESTED.
Methodology  PCR - Polymerase chain reaction
Limitations  Mean Detection = 7.43 copies/mL 95% Detection Cutoff = 28.16 copies/mL

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