Hepatitis B and C infections among Japanese dental health workers: Insights from vaccination rates and screening results in the Oita prefecture

Abstract

ObjectiveThis study examined the hepatitis B virus (HBV) and hepatitis C virus (HCV) infection rates and vaccination rates for hepatitis B (HB) among dental healthcare workers (DHCWs) in the Oita prefecture, Japan.MethodsHepatitis virus testing was conducted on 1920 participants (486 dentists and 1434 dental staff). Anonymous data on age, gender, occupation, hepatitis B surface antigen (HBsAg), antibodies to hepatitis B surface antigen (anti‐HBs), antibodies to HCV (anti‐HCV), history of HB vaccination, and antiviral treatment for individuals with positive anti‐HCV were collected.ResultsThe positivity rates for HBsAg, anti‐HBs, and anti‐HCV were 0.5%, 39.7%, and 0.6%, respectively. Dentists had significantly higher rates of anti‐HBs positivity (53.9% vs. 34.9%; p < .0001) and anti‐HCV positivity (1.4% vs. 0.3%; p = .0080) compared to dental staff. The vaccination and non‐vaccination rates among 1395 with a known HB vaccination history were 59.1% and 40.9%, respectively. Dentists had a significantly higher HB vaccine vaccination rate than the dental staff (73.6% vs. 54.0%; p < .0001). Those in the vaccination group were younger (p < .0001), had a higher proportion of males (p = .0022) and dentists (p < .0001), a lower HBsAg positivity rate (p < .0097), and a higher anti‐HBs positivity rate (p < .0001) compared to those in the non‐vaccination group. The positivity rate of HBsAg and anti‐HBs in the unvaccinated group increased with age, with HBsAg positivity reaching 3.8% in the 70s and anti‐HBs positivity reaching 40.4% in the 70s and 66.7% in the 80s.ConclusionsThis study highlights the need to raise awareness about hepatitis prevention vaccination, particularly among dental staff, due to differences in HB vaccination rates across occupations. In particular, they indicated that elderly DHCWs may be more vulnerable to HBV infection. Regular monitoring of the vaccination rate and infection risk is crucial.

Survey of Medical Referral by Japanese Dentists for Patients With Hepatitis B, Hepatitis C, and Lichen Planus

“…In the Oita prefecture, workplace health examinations for hepatitis were conducted for dental healthcare workers in 2018 and 2022 [18][19], during which they were tested for hepatitis B surface antigen (HBsAg), antibodies to HBsAg (anti-HBs), and antibodies to hepatitis C virus (anti-HCV). Additionally, hepatitis education was provided using a hepatitis booklet in 2021 [20].…”