• Pediatric Gastroenterology, Hepatology & Nutrition
• /
• 제23권4호
• /
• pp.311-318
• /
• 2020

Chronic hepatitis B viral (HBV) infection remains a major health threat, especially in high-prevalence areas. Most infants infected by mother-to-infant HBV transmission become chronic carriers. In Taiwan, many important preventive interventions have been implemented to block the perinatal transmission of HBV in the past 35 years. The first nationwide universal HBV vaccination program was launched in Taiwan in July 1984. The three-dose HBV vaccine completion rate reached 98.1% in 2018. The prevalence of Hepatitis B surface antigen (HBsAg) decreased from 9.8% in pre-vaccinated period in 1984 to 0.5% in the vaccinated cohort in 2014. The incidence of hepatocellular carcinoma in children aged 6-9 years significantly declined from 0.52 to 0.13 per 100,000 children born before and after 1984, respectively. Furthermore, we have performed a maternal HBV screening program during pregnancy since 1984, with the screening rate peaked at 93% in 2012. The HBsAg- and HBeAg-seropositive rate in pregnant women declined from 13.4% and 6.4% in 1984-1985 to 5.9% and 1.0% in 2016, respectively. To closely control perinatal HBV infection, we have administered hepatitis B immunoglobulin immediately after birth and checked the serum level of HBsAg and anti-HBs in high-risk babies born to HBsAg-seropositive mothers, irrespective of their HBeAg status, since July 2019. We have also adopted short-term antiviral treatments such as tenofovir 300 mg daily in the third trimester for highly viremic mothers and reduced the perinatal infection rates from 10.7 to 1.5%. Through all these efforts, we expect to meet the global goal of eliminating HBV infection by 2030.

• 한국치위생학회지
• /
• 제3권2호
• /
• pp.89-99
• /
• 2003

This study aims to furnish basic data about prevention and infection control of Hepatitis B Virus(HBV) for those who, working in dental offices, are particularly exposed to a high risk of HBV infection. A survey was conducted to 310 students including freshmen, sophomores and juniors enrolled in the dental hygiene department in order to examine their knowledge about infection routes of HBV, clinical history of their family members and their own health. The outcomes of the survey showed following facts; 1. Students were found to lack knowledge about the present conditions of their HBsAg and HBsAb of HBV(PF0.05), conduct of preventive vaccination(PE0.05), completion of 3 required vaccinations(PF0.05) and formation of antibody(PF0.05). 2. Students named "blood"(88.6%) and "infected needles"(82.5%) as most likely infection routes of HBV(PE0.05 and PE0.01). These replies came mostly from sophomores(65.6% and 92.1%), followed by juniors(89.2%, 82.5%) and freshmen(81.1%, 73.0%). Least knowledge about infection routes of HBV was sensed with the reply "infection through breast-feeding of positive mother(27.9%)"(PE0.05). Generally, sophomores seemed to have much knowledge about infection routes, followed by juniors and freshmen in order. 3. As to clinical history of family members, 10 students(3.5%) replied that any of their family members is suffering from HBV now, 8(2.6%) revealed that some of their family members once suffered from it and 10(3.2%) reported cases of death of their family members from liver diseases. 4. Ninety-four point seven percent of respondents believed their health to be better than normal.

• Journal of Preventive Medicine and Public Health
• /
• 제21권1호
• /
• pp.89-98
• /
• 1988

While there have been not a few reports on the seroepidemiological characteristics of hepatitis B virus (HBV) infection in Korea, most of them, however, have had several limitations; operational definition of HBV infection, validity of detection methods of HBV serologic markers, size of the study population, and confirmation of the vaccination history against HBV, etc. In order to avoid such limitations, authors randomly selected 1,495 healthy adults among the 217,511 insured (target population) of Korean Medical Insurance Corporation, living in seoul, and tested HBV serologic markers by RIA method and conducted direct interview to them. Although HBV serologic markers (HBsAg, anti-HBs and anti-HBc) of all the subjects were tested, 392(26.2%) of interview failure cases and 361 vaccinee were excluded from the actual population. Finally, the serologic markers tested of 742 nonvaccinee (study population) only were analysed for the seroepidemiologic observation of the natural infection of HBV. The seroepidemiological characteristics of HBV infection in Korea were as follows ; 1. Point prevalence of HBs antigenemia was 11.7(9.1{\sim}14.3)% in male, which was slightly higher than that of female, 9.5($3.7{\sim}15.3$)%. This level was one of the highest among those of Asian-Pacific countries. Decreasing tendency of HBsAg prevalence alter the age of 50 was observed, which seems to be due to selective attrition of HBV chronic carriers among the healthy adults and/or to the limited-lasting duration of the HBs antigenemia, in part. 2. Point prevalence of anti-HBc(78.8% in male,50.9% in female) was higher than that of anti-HBs(65.2% in male,46.6% in female), respectively. And both of them were higher in male than in female. Increasing tendency of the prevalence of both antibodies was observed by age, which seems to be largely due to recurrent infection in adults and to some cumulative effect, in part, of their relatively longer-lasting duration. 3. The level of HBV infection defined by positive for at least one of the 3 serologic markers of HBV by RIA method was 84.7($81.8{\sim}87.6$)% in male and 61.2($51.9{\sim}70.5$)% in female, which was also one of the highest among those of Asian-Pacific countries. The proportion of susceptible population to HBV infection among healthy adults was 15.3% in male and 38.8% in female. 4. The relative frequency of current or past infection and chronic carrier among HBV infected person was estimated. The currently or past infected was estimated 75.7% in male and 71.8% in female, and chronic carrier state, 13.8% in male and 14.1% in female. The analysis of the geometric mean of the antibody titer in anti-HBs positive sera indicated also to be compatible with the above findings, suggesting that active, even though inapparent, infection of HBV occur so frequently among healthy adults in Korea.

• IMMUNE NETWORK
• /
• 제5권1호
• /
• pp.1-10
• /
• 2005

Background: Chronic infection with hepatitis B virus (HBV) affects about 350 million people worldwide, which have a high risk of development of cirrhosis and hepatocellular carcinoma. Treatment of chronic HBV infection relies on IFN-${\alpha}$ or lamivudine. However, interferon-${\alpha}$ is effective in only about 30% of patients. Also, the occurrence of escape mutations limits the usage of lamivudine. Therefore, the development and evaluation of new compounds or approaches are urgent. Methods: We comparatively evaluated DNA and adenoviral vaccines expressing HBV antigens, either alone or in combined regimens, for their ability to elicit Th1-type immune responses in Balb / c mice which are believed to be suited to resolve HBV infection. The vaccines were tested with or without a genetically engineered IL-12 (mIL-12 N220L) which was shown to enhance sustained Th1-type immune responses in HCV E2 DNA vaccine. Results: Considering the Th1-type cytokine secretion and the IgG2a titers, the strongest Th1-type immune response was elicited by the DNA prime-adenovirus boost regimen in the presence of mIL-12 N220L. In addition, the codelivery of mIL-12 N220L modulated differentially the immune responses by different vaccination regimens. Conclusion: Our results suggest that the DNA prime-adenovirus boost regimen in the presence of mIL-12 N220L may be the best candidate for HBV vaccine therapy of the regimens tested in this study and will be worthwhile being evaluated in chronic HBV patients.

• Pediatric Infection and Vaccine
• /
• 제7권1호
• /
• pp.136-142
• /
• 2000

목 적 : 혈장백신의 항체의 지속성에 관한 보고는 다양하지만, 유전자재조합 백신의 추적관찰에 대한 연구는 많지 않아 저자들은 신생아시기에 유전자재조합 백신을 기본접종 후 접종방법에 따른 5년 후 항체의 지속성과 기본접종 후 각각의 항체역가에 따른 5년 후 항체음전율에 대해 알아보고자 본 연구를 시도하였다. 방 법 : 1993년 4월부터 12월까지 부산 문화병원에서 태어난 신생아 420례중 유전자재조합 백신을 기본접종 후 5년까지 추적관찰이 가능했던 114례를 대상으로 하였다. 기본접종 후와 5년 후 항체역가의 검사는 RIA로 시행하였다. 결 과 : 1) 2개월 접종을 하였을 경우 5년째 항체음성률은 5%이고, 6개월 접종을 하였을 경우 5년째 항체 음성률은 25.5%이었다(P value <0.05). 2) 2개월접종시 항체역가가 199.9 이하시 5%, 200~499.9시 0%, 500~999.9시 0%, 1,000 이상시 0%가 5년 추적검사시 항체음전이 되었다. 3) 6개월 접종시 항체역가가 199.9 이하시 66.7%, 200~499.9시 40%, 500~999.9시 23.9%, 1,000 이상시 22.5%가 5년 추적검사시 항체음전이 되었다. 결 론 : 이 연구에서는 유전자재조합 백신의 5년후 항체음전율은 5~25.5%였고, 항체가의 지속성은 접종방법과는 통계학저인 유의성을 보이지 않았고, 기본접종 후의 항체역가에 따른 5년 후 항체음전율과도 통계학적인 유의성은 보이지 않았다.

• Yonsei Medical Journal
• /
• 제59권9호
• /
• pp.1072-1078
• /
• 2018

Purpose: The Korean society has moved rapidly toward becoming a multicultural society. This study aimed to estimate the seroprevalence of hepatitis viruses and investigate hepatitis B virus (HBV) genotypic diversity in female marriage immigrants. Materials and Methods: Screening program was conducted at support centers for multicultural families in 21 administrative districts in Korea between July 2011 and January 2017. A total of 963 female marriage immigrants were included in this study. Blood samples were tested for hepatitis viral markers and HBV genotype. Results: Subjects' median age was 33 years (20-40 years), and they originated from nine countries including Vietnam (n=422, 43.8%), China (n=311, 32.3%), the Philippines (n=85, 8.8%), Cambodia (n=58, 6.0%), and Japan (n=39, 4.0%). About 30% (n=288) of subjects required hepatitis A vaccination. HBsAg positive rate was 5.4% (n=52). Positive HBsAg results were the highest in subjects from Southeast Asia (6.6%, n=38). Anti-HBs positive rate was 60.4% (n=582). About 34% (n=329) of subjects who were negative for anti-HBs and HBsAg required HBV vaccinations. Genotypes B and C were found in 54.6% (n=12) and 45.4% (n=10) of the 22 subjects with HBV, in whom genotypes were tested. Eight (0.8%) subjects were positive for anti-HCV. Positive anti-HCV results were the highest in subjects from Central Asia (7.9%, n=3). Conclusion: Testing for hepatitis viral marker (hepatitis A virus IgG and HBsAg/anti-HBs) is needed for female marriage immigrants. Especially, HBV genotype B is different from genotype C of Koreans. Therefore, interest and attention to vaccination programs for female marriage immigrants are necessary for both clinicians and public health institutes.

• Journal of Preventive Medicine and Public Health
• /
• 제30권3호
• /
• pp.508-517
• /
• 1997

1996년 5월에서 10월 사이에 대구광역시 서구보건소 이용자들 중 간염검사를 받고 설문조사에 성실히 응답한 1,160명을 연구 대상으로, 이들의 B형 간염의 위험요인 및 예방접종 유무에 따른 HBsAg 및 anti-HBs 양성률을 조사하였다. 혈청 HBsAg과 anti-HBs 검사는 EIA(Enzyme Immunoassay)법으로 하였으며, 미리 고안된 설문지를 이용하여 개인 면접법으로 설문조사를 실시하였다. 설문항목은 개인의 일반적 특성에 관한 것과 예방접종력, 과거병력 그리고 B형 간염에 대한 위험요인 등을 설문조사 하였다. 혈액검사 결과 및 설문조사 결과는 개인용 컴퓨터로 정리하여, spss/pc+ 통계 프로그램을 이용하여 $\chi^2$-검정, fisher's exact 검정, 다중 로짓 회귀 분석을 실시하였다. 연구대상자들 전체의 HBsAg 양성률은 5.2%였고, anti-HBs 양성률은 62.4%였다. 남자에서 HBsAg 양성률은 6.6%, 여자에서는 4.3%였고, anti-HBs 양성률은 남자에서는 66.7%, 여자에서는 63.5%였다. 연령을 15세 이하와 16세 이상으로 구분한 경우 15세 이하에서는 HBsAg과 anti-HBs 양성률이 각각 2.6%, 67.2%였고, 16세 이상에서는 각각 6.5%, 60.0%였으며, 두 연령군 사이에 HBsAg과 anti-HBs 양성률이 통계적으로 유의한 차이가 있었다. (p<0.05, p<0.01). 15세 이하에서 B형 간염 예방접접을 한 군에서는 HBsAg 양성률이 2.2%, anti-HBs 앙성률이 70.1%였고, B형 간염을 않은 경우에는 HBsAg 양성률이 20.0%, anti-HBs 양성률이 40.0%였다. 16세 이상에서는 B형 간염 예방접종을 한 경우 HBsAg 양성률이 3.5%, anti-HBs 양성률이 71.7%였고, B형 간염을 앓은 경우에 HBsAg 양성률은 57.1%, B형 간염 이외의 간질환을 앓은 경우에 HBsAg 양성률이 1l.1%였다. B형 간염 위험요인에 따른 HBsAg 양성률은 15세 이하와 16세 이상에서 공통적으로 가족내에 B형 간염보유자가 있는 경우에 없는 경우에 비해서 통계적으로 유의한 차이가 있었다(p<0.05, p<0.01). 혈청내 HBsAg 유무에 기여하는 요인들을 파악하기 위하여 B형 간염의 위험 요인과 개인의 B형 간염에 대한 과거력을 독립변수로하여 로짓 회귀 분석을 실시한 결과 15세 이하와 16세 이상에서 공통적으로 개인의 B형 간염력과 가족내 B형 간염 보유자가 유의하게 대상자의 혈청내 HBsAg 양성률에 영향을 미치는 변수였다. 혈청내 anti-HBs의 유무에는 15세 이하와 16세 이상에서 공통적으로 B형 간염 예방접종이 유의한 변수였다. 최근에 지역사회를 대상으로 한 B형 간염 감염수준에 관한 연구가 전무한 실정에서 B형 간염 예방접종이 활발히 시행된 후 지역사회 주민들의 B형 간염 감염에 대해 조사를 한 것은 의미있는 연구라 생각되며 앞으로 B형 간염에 대한 대책수립을 위 한 체계적이고 광범위한 형태의 감염수준 파악을 위한 연구가 수행되어야 할 것이다.

• Clinical and Experimental Pediatrics
• /
• 제51권6호
• /
• pp.610-615
• /
• 2008

목 적 : 소아 특발성 혈소판 감소 자반병은 대부분 바이러스 감염 후 수주 후에 발병하나 약 7%에서는 홍역, 풍진, B형 간염, 독감, 수두, DTP등의 예방 접종과 관련되어 발생함이 보고 되었다. 본 연구는 예방접종과 관련된 혈소판 감소 자반병의 빈도와 임상적 특성을 알아보고 예방접종과 관련이 없는 혈소판 감소 자반병과의 차이점을 분석하고자 하였다. 방 법 : 1994년 1월부터 2007년 7월까지 원광대학교 병원 소아과에 혈소판 감소 자반병으로 입원한 환아 105명을 대상으로 의무기록지를 이용하여 후향적으로 조사하였다. 예방접종과 관련된 혈소판 감소 자반병은 예방 접종 후 1개월 이내 발병으로 정의하였으며 예방접종관련 군과 없는 군으로 분류하여 여러 임상적 특성에 대해비교 분석하였다. 결 과 : 혈소판 감소 자반병은 총 105례였으며 이중 13례(12.4 %)가 예방접종과 관련되었고 DTP에 의한 경우가 8례로 가장 많았으며 HBV가 2례, 인플루엔자, MMR, 일본뇌염이 각각 1례였다. 예방접종과 관련된 군에서 다음 예방접종 시 혈소판 감소 자반병이 재발한 예는 없었다. 예방 접종 군에서 관련이 없는 군에 비해 진단 시 연령이 의미 있게 낮았으며 빈혈이 더 많이 동반되었으며 합병증과 관련이 있는 혈소판 $20{\times}10^9/L$ 미만의 위험기간이 짧았다. 또한 예방 접종 군에서 구강내 출혈, 혈변, 혈뇨와 비출혈과 같은 심한 증상이 적고 1개월 내 관해가 높았으나 통계학적 차이는 없었다. 결 론 : 예방접종과 관련된 혈소판 감소 자반병이 관련이 없는 경우에 비해 증상이 경미하고 양성의 경과를 보였으며 다음 예방 접종은 주의하여 정상적인 스케줄에 따라 시행하며 예방접종 후 혈소판 검사를 반드시 시행할 필요는 없을 것으로 사료된다.

• Clinical and Experimental Pediatrics
• /
• 제50권9호
• /
• pp.823-834
• /
• 2007

Interferon (IFN) alpha has been the first line therapy of chronic hepatitis B in children, but HBeAg seroconversion occurred in 26% of treated children compared to 11% of controls in multinational randomized controlled study. Recently, lamivudine was shown to be a potent inhibitor of Hepatitis B virus (HBV) reproduction both in HBeAg positive and in HBeAg negative (the pre-core mutant form) chronic hepatitis in randomized studies worldwide. Lamivudine therapy led to considerable improvement in the seroconversion rate of HBeAg in children with chronic hepatitis B, though long-term therapy resulted in the expansion of lamivudine-resistant mutant viruses. Combination therapy with lamivudine plus alpha-IFN does not seem to improve HBe Ag seroconversion. Above all, the most effective way to prevent hepatitis B is universal HBV vaccination.

• 문화기술의 융합
• /
• 제3권1호
• /
• pp.1-8
• /
• 2017

본 연구는 국내 수도권, 충청권, 경상권의 3개 지역의 장례종사자를 대상으로 간염A형바이러스, 간염B형바이러스, 결핵 등 직업적으로 노출되어 감염우려가 있는 주요 질병에 대한 백신접종 실태 및 근무기간에 따른 보호장비 착용실태에 대해 조사한 연구이다. 연구결과 A형간염 백신접종률은 35%, B형간염 백신접종률은 50%로 상당수 장례지도사가 해당 질병에 대한 감염위험성이 높은 상태였으며, 결핵 유병률이 1.15%로 일반인에 비해 4배정도로 상당히 높음을 확인하였다. 개인 위생측면에서 가운, 마스크, 장갑 등의 착용비율은 비교적 높은 편이었으나, 근무경력이 오래될수록 착용비율이 감소함을 관찰할 수 있었다. 고글, 머리보호대 등 직접적 체액으로부터 방어할 수 있는 보호장비의 착용률은 현저히 낮아, 전염성이 높은 질병감염질환을 가지고 있는 시신 처리시 장례종사자를 충분히 보호할 수 없었다. 장례종사자에게 A형간염, B형간염에 대한 백신 접종, 보호장비 지급 등 제도적 지원과 공중보건적 가이드라인을 제시하여 안전한 작업환경을 제공할 필요가 있다고 결론내릴 수 있었다.