Hepatitis B, C, and D virus infections are a major public health problem, and Mongolia has one of the highest prevalences of dual and triple infections in the world. We aimed to determine the seroprevalence of hepatitis infection and dual or triple hepatitis infections among 10–64-year-olds. A questionnaire was used to identify risk factors for hepatitis infection, and seromarkers were measured by the fully automated immunologic analyzer HISCL-5000. Among a total of 10,040 participants, 8.1% of the population aged 10–64 was infected with HBV, 9.4% with HCV, and 0.4% with HBV and HCV, and the prevalence of the disease varied by age, sex, and the area of residence. Young people were particularly unaware of their hepatitis infection status. A small proportion of children aged 10 to 19 years and the majority of adults younger than 30 years were unaware of their HBV and HCV infection. Men were also more likely to be unaware of their HBV and HCV infection status than women. The results suggested that the prevalence of infection in the general population is high and that most people are unaware that they are infected or have become chronic carriers. Identifying mono-, co-, or triple-infection status is critical to prevent the rapid progression of liver disease among the Mongolian population.
Objectives: Infections with hepatitis B, C, and D virus (HBV, HCV, and HDV) are a major public health problem and lead to serious complications such as cirrhosis and hepatocellular carcinoma. We aimed to determine the seroprevalence of hepatitis B surface antigen (HBsAg), anti-HCV, anti-HDV immunoglobulin G, alpha-fetoprotein (AFP), and dual and triple hepatitis virus infections in Mongolia.Methods: A total of 2313 participants from urban and rural regions were randomly recruited for this cross-sectional study. A questionnaire was used to identify the risk factors for hepatitis virus infections, and the seromarkers were measured using immunoassay kits.Results: Among all participants, the prevalence of HBV, HCV, and HDV was 15.6%, 36.6%, and 14.3%, respectively. The infection rates were significantly higher in females and participants with a lower education level, rural residence, older age, and a history of blood transfusion. HBV and HCV co-infection was found in 120 (5.2%) participants and HBV, HCV, and HDV triple infection was detected in 67 (2.9%) participants. The prevalence of elevated AFP was 2.7%, 5.5%, and 2.6% higher in participants who were seropositive for HBsAg (<i>p</i>=0.01), anti-HCV (<i>p</i><0.001), and anti-HDV (<i>p</i>=0.022), respectively. Elevated AFP was more prevalent in participants co-infected with HBV and HCV (5.8%, <i>p</i>=0.023), HBV and HDV (6.0%, <i>p</i><0.001), and triple-infected with HBV, HCV, and HDV (7.5%) than in uninfected individuals.Conclusions: Nearly half (49.8%) of the study population aged ≥40 years were infected with HBV, HCV, or HDV, and 22.4% had dual or triple infections.
Objective: To determine the prevalence of hepatitis B and C infection and its risk factors in Mongolians from 10 to 40 years of age. Method: Randomly selected Mongolians underwent phlebotomy and completed a questionnaire about their medical and family history and risk factors. Participants were screened for qHBsAg, anti-HBs, HBeAg, anti-HBe, anti-HBc markers, and Anti-HCV. Results: 6811 people, 2900 (42.7%) males, and 3911 (57.3%) females participated. Most were from Ulaanbaatar (4685, 69%), with the remaining 2126 (31%) from rural areas. Seven percent were HbsAg positive, 4.2% were HCV positive. Of those10-20 years of age, 5.8% (29) had hepatitis B, 6% (17) had hepatitis C. Of those 21 to 40 years of age, 94.2% (469) had hepatitis B, and 94%(268) had hepatitis C. Children whose mother was HBsAg positive were at higher risk of HBsAg positivity (OR 2.152; 95% CI 1.4; 3.2, p < .0001) as well as those with male gender (OR 1.703; 95% CI 1.17;2.46, p < .005), those phlebotomized for lab tests (OR 1.768; 95% CI 1.14; 2.74, p = .011) ,and those immunized against hepatitis B (OR 0.508; 95% CI 0.35; 0.74, p < .0001). HCV infection was associated with history of dental procedures (OR 1.681; 95% CI 1.01; 2.79, p = .045), using glass syringes (OR 2.131; 95% CI 1.54; 2.95, p < .0001), and previously used needles (OR 2.411; 95% CI 1.09;5.29, p = .028). Conclusions: Among the Mongolian population between 10 and 40 years of age, 7.3% were HbsAg positive, 4.2% were Anti-HCV positive. The risk factors were maternal HbsAg positivity, utilization of glass syringes, reusing needles, phlebotomy for laboratory tests, receiving dental treatment, and the absence of hepatitis B immunization.
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