CE Marked

For In Vitro Diagnostic Use

The Abbott RealTime HBV Viral Load Assay is for quantitation of Hepatitis B virus in chronically infected HBV individuals.

The Abbott RealTime HBV assay delivers accurate quantitation of genotypes  A, B, C, D, E, F, G, H and consists of three reagent kits:

  • Abbott RealTime HBV Amplification Reagent Kit
  • Abbott RealTime HBV Control Kit 
  • Abbott RealTime HBV Calibrator Kit

Detection and Quantitation of HBV Genotypes

Genotype dilution linearity was demonstrated by diluting eight specimens, one of each genotype A through H, to target concentrations of 4.47 log IU/mL, 3.47 log IU/mL, 2.47 log IU/mL, and 1.17 log IU/mL. Three replicates were tested at each concentration for each genotype. The correlation coefficients ranged from 0.995 to 0.999.

Correlation to Comparator Assay

Specimens from 106 HBV positive patients were tested with the Abbott RealTime HBV assay and a comparator assay (Comparator 2). Three samples were above the comparator assay's upper limit of detection and were excluded from the correlation analysis.

Linear Range

The upper limit of quantitation (ULQ) for the Abbott RealTime HBV assay is 1 billion IU/mL and the lower limit of quantitation is equivalent to LOD (10 IU/mL for the 0.5 mL sample preparation procedure, 15 IU/mL for the 0.2 mL sample preparation procedure).

A 13-member panel prepared by diluting an HBV positive specimen targeted from 9.13 log IU/mL to 0.29 log IU/mL in HBV negative human plasma was tested. Six replicates of each panel member were tested (3 replicates per run, 2 runs total). The Abbott RealTime HBV assay was shown to be linear in plasma across the range of HBV DNA concentrations tested.


Intended Use

The Abbott RealTime HBV is an in vitro polymerase chain reaction (PCR) assay for the quantitation of Hepatitis B Virus (HBV) DNA in human plasma or serum from HBV-infected individuals. The Abbott RealTime HBV assay is intended for use in conjunction with clinical presentation and other laboratory markers as an indicator of disease prognosis and for use as an aid in assessing viral response to antiviral treatment as measured by changes in plasma or serum HBV DNA levels.  This assay is not intended for use as a screening test for HBV or as a diagnostic test to confirm the presence of HBV infection.

An Assay Designed with Leading Science

The unique combination of the Abbott RealTime HBV assay design features ensures reliable detection of all major HBV genotypes with a high degree of precision. 

Abbott RealTime HBV assay design
Abbott RealTime HBV assay design

Precise External Calibration

A key assay design feature of the Abbott RealTime HBV assay is enabling high precision. The use of different primers for the HBV target and internal control (heterologous) minimizes competitive effects in the PCR reaction. The stored calibration curve reduces the variability of the viral load calculation compared to an internal calibration design.

Conserved Target Region

The selection of a highly conserved region within the surface gene provides for the accurate detection of genotypes A-H. 

The location of the target region in the N-terminal third of the surface gene ensures that the assay is not impacted by YMDD mutants, HBsAg escape mutants, or drug resistant mutants, as this region is essential for the assembly and secretion of subviral particles, and tolerates only minor structural changes. 

Hepatitis B Virus Genome and Target Region

Abbott RealTime HBV assay target region 
Primers and probe are targeted within an essential segment of the surface gene. 

Optimal Cycling Conditions

The Abbott RealTime HBV selection of assay and cycling conditions enhances amplification and detection of target sequences harboring mismatches.


Sensitivity10 IU/mL for 0.5 mL sample volume
15 IU/mL for 0.2 mL sample volume
Linear Range10 IU/mL (1.00 log IU/mL) to 1 billion IU/mL (9.00 log IU/mL)
PrecisionInter-assay SD < or = 0.25 log IU/mL
Genotype DetectionAccurate quantitation of genotypes A, B, C, D, E, F, G, H
Specimen TypeSerum (collected in serum separator tubes), and Plasma (EDTA, ACD and plasma preparation tubes)
StandardizationWorld Health Organization (WHO) International Standard for Hepatitis B Virus DNA (97/746)
Internal ControlAdded to lysis buffer during extraction and detected at all levels

*Performance data shown from internal verification.
1 The specificity of the Abbott RealTime HBV assay was evaluated by testing 59 HBV seronegative serum and 58 HBV seronegative plasma specimens. HBV DNA was not detected, resulting in 100% (117/117) specificity.