Hepatology International

, Volume 3, Issue 3, pp 461–467

Prevalence of hepatitis B virus genotype B in Vietnamese patients with chronic hepatitis B

  • Long H. Nguyen
  • Nghiem B. Ha
  • Philip Vutien
  • Nghi B. Ha
  • Ruel T. Garcia
  • Huy N. Trinh
  • Brian S. Levitt
  • Huy A. Nguyen
  • Khanh K. Nguyen
  • Emmet B. Keeffe
  • Mindie H. Nguyen
Original Article

DOI: 10.1007/s12072-009-9141-2

Cite this article as:
Nguyen, L.H., Ha, N.B., Vutien, P. et al. Hepatol Int (2009) 3: 461. doi:10.1007/s12072-009-9141-2

Abstract

Purpose

Hepatitis B virus (HBV) genotypes can affect treatment response to interferon-based therapy and disease outcomes in patients with chronic hepatitis B (CHB). Little data exist to characterize HBV genotypes in Vietnamese, one of the largest minority groups in the United States and also one with one of the highest CHB and liver cancer disease burdens. The goal of this study was to compare the distribution of HBV genotypes in Vietnamese and Chinese patients.

Methods

We performed a cross-sectional study of 567 consecutive patients of Vietnamese (n = 478) or Chinese (n = 89) descent, with HBV genotype mutation analysis performed between 7/2,005 and 6/2,008 at a community gastroenterology clinic and a university-affiliated liver clinic in the United States.

Results

There were no significant differences between the Vietnamese and Chinese groups in mean age (45 and 44 years), gender (58% and 61% male), HBeAg status (64% and 65% negative), median alanine aminotransferase (33 and 41 U/L), and log10 HBV DNA (4.9 and 5.0 log10 IU/ml), or the prevalence of precore/basic core promoter mutations (72% and 71%), respectively. Vietnamese patients had a much higher prevalence of HBV genotype B and a lower prevalence of genotype C than Chinese patients: 74% and 25% vs. 55% and 43% (P = 0.001).

Conclusions

Chinese patients with CHB often carry either B or C genotype. Vietnamese patients with CHB mostly have HBV genotype B. Additional studies are needed to further characterize the clinical significance of HBV genotype in the natural history and treatment outcomes of CHB in Vietnamese patients.

Keywords

Epidemiology Asian HBV 

Copyright information

© Asian Pacific Association for the Study of the Liver 2009

Authors and Affiliations

  • Long H. Nguyen
    • 1
    • 2
  • Nghiem B. Ha
    • 2
  • Philip Vutien
    • 2
  • Nghi B. Ha
    • 2
  • Ruel T. Garcia
    • 2
    • 3
  • Huy N. Trinh
    • 2
    • 3
  • Brian S. Levitt
    • 3
  • Huy A. Nguyen
    • 3
  • Khanh K. Nguyen
    • 3
  • Emmet B. Keeffe
    • 4
  • Mindie H. Nguyen
    • 4
  1. 1.School of MedicineStanford UniversityStanfordUSA
  2. 2.Pacific Health FoundationSan JoseUSA
  3. 3.San Jose GastroenterologySan JoseUSA
  4. 4.Division of Gastroenterology and HepatologyStanford University Medical CenterStanfordUSA

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