Hepatitis B – Genotyping

Specimen Collection and Handling

Specimen Requirements

Test Requested Required Requisition(s) Specimen Type Minimum Volume Collection Kit

Hepatitis B Virus (HBV) Genotyping

Serum

1.0 ml

Blood, clotted - vacutainer tubes (SST)

Hepatitis B Virus (HBV) Genotyping

Plasma

1.0 ml

EDTA tubes

Submission and Collection Notes

1

Under ‘OTHER’ for clinical information, indicate results for markers to the Hepatitis B virus and HBV DNA. HBV DNA must have a detectable viral load.

Limitations

Haemolysed, icteric, lipemic or microbially contaminated sera or plasma are not recommended for testing.

Preparation Prior to Transport

Label the specimen container with the patient’s full name, date of collection and one other unique identifier such as the patient’s date of birth or Health Card Number. Failure to provide this information may result in rejection or testing delay.

Special Instructions

Centrifuge the SST/EDTA tube and transfer serum/plasma to a cryovial. Store serum/plasma specimen frozen at <-60°C following collection.  Place specimen in biohazard bag and seal. Ship to PHOL frozen on dry ice or ice packs.

Requisitions and Kit Ordering

Test Frequency and Turnaround Time (TAT)

Hepatitis B - genotyping specimens are shipped to NML biweekly. 

Turnaround time is up to 21 days

Reporting

Results are reported to the ordering physician or health care provider as indicated on the requisition.

Test Methods

Hepatitis B - Genotyping Test is referred to the National Microbiology Lab (NML) in Winnipeg.

Hepatitis B serology and DNA results – Serology results must show markers to Hepatitis B virus and HBV DNA results must have detectable viral load.

Hepatitis B Genotype testing is performed by conventional Polymerase Chain Reaction (PCR) followed by 1) line probe hybridization assay in which reactivity to genotype specific probes indicates the HBV genotype(s), or 2) sequence and phylogenetic analysis in comparison to HBV genotype reference sequences.

contact lab

Contact Laboratory Customer Service

Laboratory Services

customerservicecentre@oahpp.ca

Updated 4 Jan 2019