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Korean Journal of Epidemiology 2002;24(2): 107-112.
Sero-prevalence of Hepatitis B Virus Surface Antigen and Antibody in High School Students in Chungju-city.
Hyeongsu Kim, Kun Sei Lee, Soung Hoon Chang, Suekyung Park, Cheongsik Kim, Chang Hee Lee, Hyuk Jung Kweon, Soon Sup Chung
1Department of Preventive Medicine, College of Medicine,Konkuk University, Korea. kunsei_lee@kku.ac.kr
2Department of Radiology, College of Medicine, KonkukUniversity, Korea.
3Department of Family Medicine, College of Medicine, KonkukUniversity, Korea.
4Department of General Surgery, College of Medicine, KonkukUniversity, Korea.
Abstract
OBJECTIVES:
Since Korea has been known to be one of the endemic area for hepatitis B virus(HBV) infection, vaccination for HBV has been recommended for all neonates in Korea. After starting vaccination in 1983, the change of sero-positivity of HBsAg and HBsAb is expected. This study was carried out to investigate the seropositive rate of hepatitis B virus surface antigen and antibody in high school freshmen students in Chungju-city. METHODS AND MATERIALS: From 1998 to 2001, a total of 11,735 who were born in 1982 to 1986, were enrolled in this study. HBsAg and anti-HBs were tested by reversed passive hemagglutination and passive hemagglutination, respectively. PESULTS: The study population was 11,735 students who were composed of 5,813 males (49.6%) and 5,914 females (50.4%). The HBsAg sero-positivity of male and female students was 3.25% (n=381) and 2.59% (n=153) respectively. The anti-HBs sero-positivity of male and female students was 62.2% (n=3,154) and 64.1% (n=2,969) respectively. There are significant difference observed in comparison of HBsAg and anti-HBs seropositivity according to sex (p<0.05). From 1982 to 1986 on birth year, anti-HBs sero-positivity has been increased significantly from 63.3% to 73.3%. But the change of HBsAg sero-positivity has not been changed significantly.
CONCLUSIONS:
As compared with previous studies of HBsAg and anti-HBs, the sero-positive rate of HBsAg has not been changed but that of HBsAb has been increased significantly. This result revealed that the effect of HBV vaccination program was successful.
Keywords: Hepatitis B; HBsAg; HBsAb


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