Seroprevalence of Hepatitis B Virus Infection, Mother-To-Child Transmission, and Associated Risk Factors Among Delivering Mothers in Tigray Region, Northern Ethiopia: a Cross-Sectional Study.

INTRODUCTION: High prevalence of hepatitis B virus (HBV) infection among pregnant women is the primary source of infection for their children and the general population. Mother-to-child transmission (MTCT) is the primary mode of transmission in endemic areas like Ethiopia. The aim of this study was to determine the prevalence of HBV infection, rate of MTCT, and associated risk factors among delivering mothers. METHODS: This health facility-based cross-sectional study was conducted in four public hospitals of the Eastern zone of Tigray among 473 delivering mothers. Structured questionnaires and laboratory results were used to collect the data. The data were checked for completeness and entered into EpiData manager version 4.6.0.0. Then the data were exported to Statistical Package for Social Sciences (SPSS) version 23. The odds ratio, along with a 95% confidence interval, was estimated to identify predictors of HBV infection using multivariable logistic regression analysis. Significant association was considered at p < 0.05. RESULTS: A total of 473 mothers were enrolled, and the response rate was 100%. The prevalence of HBV infection among the mothers and the rate of MTCT of the infection were 11.6% and 30.9%, respectively. History of home delivery [adjusted odds ratio (AOR) = 4.5, 95% confidence interval (CI) (2, 10.6)], history of hospital admission [AOR = 5, 95% CI (2.2, 11.5)], working at health facility [AOR = 5.4, 95% CI (1.4, 20.7)], body tattoos [AOR = 5.8, 95% CI (2.4, 13.6)], sharing personal care materials [AOR = 3.8, 95% CI (1.4, 9.9)], insufficient knowledge [AOR = 5.6, 95% CI (1.6, 19)], and having human immunodeficiency virus (HIV) [AOR = 5.1, 95% CI (1, 26.2)] were significantly associated with HBV infection. CONCLUSION: HBV infection among delivering women is becoming highly endemic, and the rate of MTCT was high. Therefore, administering hepatitis B vaccine to all neonates within 24 h of birth is mandatory to prevent MTCT of HBV infection and related complications. Furthermore, health education and dissemination of information about HBV for the pregnant mothers are needed to reduce HBV infection and vertical transmission in Ethiopia.