Hepatitis B Virus Genotype by Sequencing
Also known as: HBVGENO
Use
This test is used to determine antiviral drug resistance by DNA sequencing in patients infected with the Hepatitis B virus. It sequences both the HBV RT polymerase and the HBsAg encoding regions, identifying major HBV genotypes as well as resistance and surface antigen mutations. The information obtained is crucial for the management of drug resistance in patients undergoing antiviral therapy.
Special Instructions
This test requires a level of HBV viral load greater than log 3.0 or 1,000 IU/mL of plasma for successful sequencing. Heparinized specimens are unacceptable, and specimens must be separated from cells within 24 hours. Transport the separated serum or plasma in a frozen state.
Limitations
The test may not detect mutations in viral sub-populations that constitute less than 20% of the total. Challenges such as a low viral load, PCR inhibitors, and viral genetic variation may lead to PCR failure and indeterminate genotyping results.
New York Approved
Methodology
NGS (Targeted)
Biomarkers
LOINC Codes
- 104995-6
Result Turnaround Time
7-10 days
Related Documents
For more information, please review the documents below
Specimen
Plasma
Volume
2 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Separate serum or plasma from cells within 24 hours and transfer to an ARUP Standard Transport Tube.
Storage Instructions
Frozen.
Causes for Rejection
Heparinized specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 hours |
| Refrigerated | 1 week |
| Frozen | 6 weeks |
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