Lab Med Online.  2020 Jul;10(3):227-234. 10.3343/lmo.2020.10.3.227.

Recent Seroprevalence of Anti-hepatitis A IgG in the Korean Population: a Large, Population-based Study

Affiliations
  • 1Department of Laboratory Medicine, Green Cross Laboratories, Yongin, Korea
  • 2Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
  • 3Green Cross Laboratories, Yongin, Korea

Abstract

Background
Because there is limited recent information on this topic, this study investigated the seroprevalence of anti-hepatitis A virus (HAV) immunoglobulin G (IgG) in the South Korean population in 2015–2017.
Methods
Anti-HAV IgG seroprevalence data were obtained from the laboratory information system of Green Cross Laboratories, one of the largest referral laboratories in South Korea.
Results
During the three-year study period, we obtained test results from 240,840 individuals (124,353 men and 116,487 women) from 1,348 hospitals and local clinics throughout South Korea. The median (range) age of subjects was 38.0 (18.0–97.2) years. The annual seroprevalence of anti-HAV IgG was 53.3%, 53.0%, and 53.1% in 2015, 2016, and 2017, respectively. The median age differed among geographic regions and anti-HAV seroprevalence differed among age groups and geographic regions (P<0.0001). Subjects in their 20’s had a significantly lower rate of anti-HAV IgG-positivity than subjects in their 10’s (odds ratio, [OR] 0.74, 95% CI, 0.69–0.78, P<0.0001), while other age groups had higher rates. Multivariable-adjusted logistic regression analysis showed that women and subjects living in Inchoen, Sejong city, Gangwon province, Gwangju, and North Jeolla province were more likely to be immune to HAV compared to subjects living in Seoul (OR >1.0, P<0.05).
Conclusions
This study provides basic information about the recent seroprevalence of anti-HAV IgG in the Korean population and contributes to identifying groups at high risk of an HAV epidemic.

Keyword

Hepatitis A; Seroepidemiologic studies; Korea; Hepatitis A antibodies
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