BK Virus Quantitation, Urine
Test Mnemonic
UBKQT
CPT Codes
- 87799 - QTY (1)
LOINC ®
41480-5
Includes
- BK Virus, Urine Interp
- BK Virus, Urine, IU/mL
- BK Virus, Urine, log IU/mL
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 5 mL | Urine, random | Sterile container | Refrigerated | Send to Cleveland Clinic Laboratories on the day of collection. Specimen source required. Specimen must be transferred into cobas PCR Urine Sample Kit within 24 hours of collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 24 hours if neat. If transferred into cobas PCR Urine Sample Kit within 24 hours, stability is increased to 90 days. |
| Refrigerated | 24 hours if neat. If transferred into cobas PCR Urine Sample Kit within 24 hours, stability is increased to 90 days. |
Days Performed
Mon - Fri
Turnaround Time
2 - 4 days
Methodology
| Name | Description |
|---|---|
| Real-Time Polymerase Chain Reaction (RT-PCR) |
Reference Range
Special Info
Must indicate specimen source.
Clinical Info
Detect and quantify BK virus in urine. The quantitative range of this assay is 2.3 - 8.0 log IU/mL (200-100,000,000 IU/mL). A negative result (<1.1 log IU/mL or <12.2 IU/mL) does not rule out the presence of PCR inhibitors in the patient specimen or BK virus DNA concentrations below the level of detection of the assay. Inhibition may also lead to underestimation of viral quantitation. No international standard is currently available for calibration of this assay. Caution should be taken when interpreting results generated by different assay methodologies. If the assay did NOT detect the virus, the test result will be reported as Negative. If the assay DETECTED the presence of the virus but was not able to accurately quantify the viral concentration, the test result will be reported as "<2.3 log IU/mL (<200 IU/mL), not quantifiable."