Abstract:
BACKGROUND:Hepatitis B virus (HBV) infection is the most common cause of liver disease in endemic areas such as South Korea. After HBV vaccination, hepatitis B surface antibody (HBsAb) titers gradually decrease. Trends in HBsAb titers have not been evaluated among children in South Korea over the past decade. METHODS:We screened 6155 patients (aged 7 months to 17 years) who underwent HBV antigen/antibody testing at Chung-Ang University Hospital from May 2012 to April 2015. Titer criteria were defined as follows: positive, titer ≥100 IU/L; weakly positive, titer 10-99 IU/L; and negative, titer <10 IU/L. We also compared titers before and 1 month after a single booster vaccination. RESULTS:Of the 5655 patients included, 3016 were male and 5 (0.09%) tested positive for HBV surface antigen. A marked reduction in antibody titer was observed until 4 years of age. Thereafter, the titers showed fluctuating decreases. HBsAb titers reached their lowest levels by 14 years of age. After 7 years of age, 50% of patients tested negative for HBsAb. Simple linear analysis showed that the titer reached levels of <10 IU/L and zero at 12.9 and 13.4 years of age, respectively. 1 month after a single booster vaccination was administered to those who were HBsAb-negative (n = 72), 69 children (96%) had developed antibodies while 3 (4%) remained HBsAb-negative. CONCLUSIONS:In conclusion, the continuous reduction in HBsAb titers over time and in each age group was confirmed. The titer level was shown significant decline until age 4. More than half of the sample had negative titers after age 7 years. After booster vaccination, most of child significantly increase titer level.
journal_name
BMC Pediatrjournal_title
BMC pediatricsauthors
Lee KH,Shim KS,Lim IS,Chae SA,Yun SW,Lee NM,Choi YB,Yi DYdoi
10.1186/s12887-017-0924-7subject
Has Abstractpub_date
2017-07-14 00:00:00pages
164issue
1issn
1471-2431pii
10.1186/s12887-017-0924-7journal_volume
17pub_type
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