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Characterization of Acute and Chronic Hepatitis B Virus Genotypes in Canada

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  • Carla Osiowy
  • Elizabeth Giles
  • Max Trubnikov
  • Yogesh Choudhri
  • Anton Andonov

Abstract

Objective: The prevalence and distribution of hepatitis B virus (HBV) genotypes in Canada is not known. Genotypic analysis may contribute to a better understanding of HBV strain distribution and transmission risk. Methods: HBV surface antigen (HBsAg) positive samples of acute (n = 152) and chronic (n = 1533) HBV submitted for strain analysis or reference genotype testing between 2006 and 2012 were analyzed. The HBsAg coding region was amplified to determine the HBV genotype by INNO-LiPA assay or sequence analysis. Single and multivariate analyses were used to describe genotypes’ associations with known demographic and behavioral risk factors for 126 linked cases of acute HBV. Results: Nine genotypes were detected (A to I), including mixed infections. Genotype C (HBV/C) dominated within chronic infections while HBV/D and A prevailed among acute HBV cases. History of incarceration and residing with a chronic HBV carrier or injection drug user were the most frequently reported risks for acute HBV infection. Over time, HBV/A increased among both acute and chronic infections, and HBV/C and HBV/D decreased among chronic infections. Conclusion: Chronic and acute HBV genotypes in Canada differ in the relative distribution and their associations with known risk factors, suggesting different routes of transmission and clinical progression of infection.

Suggested Citation

  • Carla Osiowy & Elizabeth Giles & Max Trubnikov & Yogesh Choudhri & Anton Andonov, 2015. "Characterization of Acute and Chronic Hepatitis B Virus Genotypes in Canada," PLOS ONE, Public Library of Science, vol. 10(9), pages 1-20, September.
    • Handle: RePEc:plo:pone00:0136074
    DOI: 10.1371/journal.pone.0136074
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    References listed on IDEAS

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    1. Carmine Rossi & Kevin Schwartzman & Olivia Oxlade & Marina B Klein & Chris Greenaway, 2013. "Hepatitis B Screening and Vaccination Strategies for Newly Arrived Adult Canadian Immigrants and Refugees: A Cost-Effectiveness Analysis," PLOS ONE, Public Library of Science, vol. 8(10), pages 1-1, October.
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