Trends and Burden of Hepatitis B Viral Infection in Children and Adults in a Tertiary Health Facility in North East Nigeria Over a Fifteen-year Period.

Background: Hepatitis B infection is endemic in Nigeria where greater than six percent of the general population are chronic carriers. Transmission predominantly occurs in infants and children when compared with adults. Viral hepatitis deaths are mostly due to chronic liver disease. Routine immunization against hepatitis B virus infection in Nigeria is still low.

Aims: We planned to describe the burden and trend of hepatitis B viral infection at Federal Teaching Hospital, Gombe.

Methodology: This study was a retrospective cross-sectional descriptive study. The results of all hepatitis B surface antigen (HBsAg) tests using rapid chromatographic immunoassay performed at the Federal Teaching Hospital, Gombe (FTHG), Nigeria from January 2000 to December 2014 were retrieved and analyzed.

Results: Between 2000 and 2014, 23,611 individuals ranging from 2 months to 98 years of age were tested for HBsAg. A total of 13,136 (55.6%) were males and 10,475 (44.4%) were females. Among individuals tested for hepatitis B surface antigen, 18.9% (4,456) were positive. A total of 70.6% (3,147) were males and 29.4% (11,239) were females. Male sex was significantly associated with HBsAg positivity (P < 0.001). The mean HBsAg prevalence over the 15-year periods among males and females were 22% and 12%, respectively (P < 0.001). The mean yearly HBV prevalence was 17.5%, 17.2%, 19.6%, 15.5%, and 4.4% among age-groups 0-18 years, 19-25 years, 26-45 years, 56-65 years, and >65 years, respectively (P = 0.132). The proportion of HBsAg-positive individuals was highest in the year 2012 (28.7%) and lowest in 2014 (1.8%).

Conclusion: There was an increasing trend in HBV testing and diagnosis in children and adults in our facility over the last 15 years. Health facility capacity for HBV treatment and care requires strengthening.