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Elecsys® Anti-HBs II

Immunoassay for the quantitative determination of antibodies to hepatitis B surface antigen (HBsAg)

Elecsys® Anti-HBs II

Elecsys® Anti-HBs II

  • Systems

    cobas e 411 analyzer, cobas e 601 / cobas e 602 modules, cobas e 801 module

  • Testing Time

    18 minutes

  • Test principle

    Double antigen sandwich assay

  • Calibration

    2-point

  • Interpretation

    <10 IU/L = non-reactive
    ≥10 IU/L = reactive

  • Traceability

    First World Health Organization (WHO) Reference Standard 1977

  • Sample material

    Serum collected using standard sampling tubes or tubes containing separating gel. K2-EDTA and K3-EDTA plasma.

  • Sample volume

    40 μL cobas e 411 analyzer, cobas e 601 / cobas e 602 modules
    24 μL cobas e 801 module

  • Onboard stability

    8 weeks cobas e 411 analyzer, cobas e 601 / cobas e 602 modules
    16 weeks cobas e 801 module

  • Intermediate precision in positive samples

    cobas e 411 analyzer: CV 4.4 – 4.6 %
    cobas e 601 / cobas e 602 modules: CV 1.9 – 2.8 %
    cobas e 801 module: CV 1.5 – 6.3 %

  • Relative sensitivity

    100 % (n = 296, vaccinated)
    100 % (n = 373, recovered from HBV infection)

  • Relative specificity

    99.78 % (n = 2,673, blood donors)
    99.45 % (n = 1,623, routine samples)

References

 

  1. WHO. Hepatitis B. Fact sheet N°204. Available at: http://www.who.int/mediacentre/factsheets/fs204/en, accessed November 2017.
  2. Seeger, C., Zoulim, F., Mason, W.S. (2007). Hepadnaviruses. In: Field’s Virology, Knipe DM, Howley RM (eds), 5th edition, Lippincott Williams and Wilkins, Philadelphia, USA. Chapter 76, 2977-3029.
  3. WHO (2009). Hepatitis B vaccines. Wkly Epidemiol Rec 84, 405-419.
  4. Liaw, Y.F., Chu, C.M. (2009). Hepatitis B virus infection. Lancet 373, 582-592.
  5. Caspari, G., Gerlick, W.H. (2007). The serologic markers of hepatitis B virus infection – proper selection and standardized interpretation. Clin Lab 53, 335-343.
  6. Kramvis, A., Kew, M., François, G. (2005). Hepatitis B virus genotypes. Vaccine 23, 2409-2423.
  7. Michel, M.L., Tiollais, P. (2010). Hepatitis B vaccines: protective efficacy and therapeutic potential. Pathol Biol (Paris) 58, 288-295.
  8. Elgouhari, H.M., Abu-Rajab Tamini, T.I., Carey, W. (2008). Hepatitis B virus infection: understanding its epidemiology, course, and diagnosis. Cleve Clin J Med 75, 881-889.