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  • Title: Prevalence of HBV and HCV infections, Bhutan, 2017: Progress and next steps.
    Author: Tshering N, Dhakal GP, Wangchuk U, Wangdi S, Khandu L, Pelden S, Nogareda F, Patel MK, Hutin YJF, Wannemuehler K, Rewari BB, Wangchuk S.
    Journal: BMC Infect Dis; 2020 Jul 08; 20(1):485. PubMed ID: 32641006.
    Abstract:
    BACKGROUND: Bhutan is committed to eliminating hepatitis B and hepatitis C, though recent baseline estimates of disease burden in the general population are unknown. In 2017, we carried out a biomarker survey in the general population to estimate the prevalence of hepatitis B virus (HBV) and hepatitis C virus (HCV) biomarkers to evaluate the impact of immunization and guide further efforts. METHODS: In 2017, a cross-sectional, population-based, three-stage cluster survey was undertaken of the general population (1-17 and 20+ years of age). We visited households, collected blood specimens and administered a standard questionnaire. Specimens were collected for hepatitis B surface antigen (HBsAg) and hepatitis C virus antibody (anti-HCV) testing. We calculated prevalence of infection and selected characteristics, along with confidence intervals (CIs). RESULTS: Of 1372 individuals approached, 1358 (99%) participated. Of those, 1321 (97%) had a specimen tested for HBsAg, and among 1173 enrolled individuals 5 years of age or older, 1150 (98%) individuals were tested for anti-HCV. The prevalence of HBsAg was 2.0% in 775 persons 20 years of age or older (95% CI: 1.0-4.0) and 0.5% in 546 persons 1-17 years of age (95% CI: 0.1-1.8). The prevalence of anti-HCV was 0.3% (95% CI: 0.1-0.8) among persons ≥5 years. CONCLUSIONS: Universal hepatitis B immunization of infants has resulted in a low prevalence of chronic HBV infection in persons 1-17 years of age and the prevalence of anti-HCV is low among persons aged ≥5 years. Efforts should continue to reach high coverage of the timely birth dose along with completion of the hepatitis B vaccine series. To reduce the chronic liver disease burden among adults, HBV and HCV testing and treatment as indicated might be restricted to pregnant women, blood donors, individuals with chronic liver diseases, and other groups with history of high-risk exposures.
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