• Journal of agricultural medicine and community health
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• v.41 no.3
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• pp.119-128
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• 2016

Objective: This study was to investigate the knowledge, health belief, and vaccination behavior on hepatitis A among university students. Methods: A self-administered questionnaire survey was conducted from $3^{rd}$ to $25^{th}$ March, 2014 and 197 subjects were enrolled in statistical analysis. Results: The result showed that the score for knowledge of the subjects on hepatitis A was $4.59{\pm}3.06$ out of 15 points, for health belief $2.39{\pm}0.28$ out of 4 points, and the vaccination rate of the subjects was 12.7%. There was significant difference in hepatitis A knowledge score according to experience of hepatitis A check-up and hepatitis A vaccination history of family members, and in health belief according to gender. For hepatitis A vaccination there was significant difference according to experience of hepatitis A check-up, family history of liver disease, hepatitis A vaccination history of family members, and education history of hepatitis A. As a result of logistic regression analysis experience of hepatitis check-up and hepatitis A vaccination history of family members were significant factors for hepatitis A vaccination. Conclusions: The level of knowledge, health belief for hepatitis A of the subjects was low and vaccination rate also low. The experience of hepatitis A check-up and hepatitis A vaccination history of family members were factors affecting hepatitis A vaccination. It would be necessary to develop programs for improving level of knowledge and health belief and raising the rate of hepatitis A vaccination for the university students in Korea.

• Neonatal Medicine
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• v.17 no.1
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• pp.123-126
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• 2010

Hepatitis A virus (HAV) infection is a common cause of acute hepatitis, but is rarely responsible for neonatal hepatitis. HAV infection is usually transmitted by the fecal-oral route, but during the neonatal period can be transmitted by the intrauterine vertical route or postnatal horizontal route. HAV infection is usually self-limited, but it can be potentially life-threatening in adults. The clinical course and symptoms are mild and the infection can be asymptomatic in newborns. Recently, we experienced a case of symptomatic neonatal hepatitis A. To our knowledge, this is the first case of neonatal hepatitis with HAV infection in Korea.

• Journal of the Korea Convergence Society
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• v.7 no.1
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• pp.69-75
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• 2016

This study tries to look into the relationship between preventive behaviors and health belief for hepatitis A and seroprevanlence rate of hepatitis A. The cross ratio of seroprevanlence rate of hepatitis A significantly increased with an increase in age [1.210(95% CI, 1.158-1.264)], and those who had hepatitis A vaccination had a significantly higher cross ratio than those who didn't [19.591(95% CI 6.524-58.82)], and the more health motivation they had, the higher the cross ratio was [1.478(95% CI 1.053-2.075)]. To increase seroprevalence rate of hepatitis A, it is necessary to provide personal hygiene for health motivation and prevention education thoroughly and to give vaccination of hepatitis A.

• 건강소식
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• v.30 no.6 s.331
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• pp.21-21
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• 2006

대한소아청소년과개원의협의회(회장 임수흠)는 최근 'A형 간염에 대해 일반인들이 잘못 알고 있는 다섯 가지 오해'를 발표했다. 협의회는 '오염된 음식물이나 식수, 개인 접촉 등을 통해 전파되는 수인성 전염병인 A형 간염은 최근 어린이와 청소년의 항체 보유율이 10% 이하로 떨어져 집단 감염 위험이 커지고 있다.'면서 '적극적인 예방 활동이 필요하다.'고 강조했다.

• 건강소식
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• v.35 no.1
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• pp.16-17
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• 2011

최근에 국내에서 사회적인 문제가 되었던 급성 A형 간염은 염증이 생긴지 1~6개월 이내에 회복되는 질환이다. 그러나 A형 간염과는 달리 염증이 6개월 이상 낫지 않고 지속되는 경우를 만성간염이라 정의한다. 만성간염에 대해 자세히 알아보자.

• Journal of Convergence for Information Technology
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• v.11 no.5
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• pp.150-157
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• 2021

The purpose of this study was to develop a prevention education program by grasping the knowledge of hepatitis A, Immunization and prevention behavior of university students. The subject of the study was questionnaire for 219 students, excluding the 3rd and 4th graders of the Department of Nursing. Collected data were analyzed by frequency, percentage, t-test, ANOVA, Pearson correlation using SPSS 18.0. As a result of the study, knowledge of hepatitis A was determined by gender, major, allowance for a month, HAV education experience within 3 months, personal antibody retention, HAV hepatitis, and cases of HAV infection among family members, hepatitis A prevention behavior showed a significant difference in the type of residence. In order to increase the hepatitis A vaccination rate of university students through this study, the need for vaccination and promotion of adult vaccination is necessary, and the development of a program that enables habitual preventive behaviors is needed.

• Clinical and Experimental Pediatrics
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• v.50 no.3
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• pp.262-267
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• 2007

Purpose : The prevalence of hepatitis A virus (HAV) in a certain community reflects that community's living standards and hygienic conditions. And the pattern of HAV infection differs over time and geography. Recently, a shift in prevalence has been observed in cases from chilhood to adulthood. We studied the HAV antibody prevalence in the general population in Busan. Methods : From October 2004 to March 2005, total 472 subjects were tested for HAV antibodies. All samples were collected from patients in Maryknol Hospital. Results : The overall seropositive rate was 22.8% (108/472). The seropositive rates were 1.7% in subjects aged 2-5 years, 1.7% in 6-10 years, 0% in 11-20 years, 40.5% in 21-30 years, 82.1% in 31-40 years, 94.7% in 41-50 years, and 100% in subjects aged over 50 years. There was no significant gap between gender groups. Conclusion : As the socioeconomic conditions in Korea have improved, the HAV seropositive rate in school-aged children has dramatically decreased in the last 20 years. But, the seropositive rate of HAV didn't differ according to gender. The seropositive rate of HAV in the pediatric group was very low, which suggests the increasing possibility of clinical HAV infection in adults in the near future. Therefore, we should actively prevent the spread of hepatits A virus. In order to do that, we need to reorganize our lifestyle and personel hygiene and carry out active and passive immunization to high risk groups.

• Pediatric Infection and Vaccine
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• v.20 no.3
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• pp.147-160
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• 2013

Purpose: Although the overall incidence of hepatitis A in Korea has been decreasing recently, the adolescents born before the introduction of the hepatitis A vaccine remain to be highly vulnerable to outbreak. This study examines the unvaccinated adolescents' and their parents' knowledge and health beliefs toward hepatitis A vaccination. Methods: Healthy adolescents aged 13-19 years old who had no previous history of hepatitis A vaccine and hepatitis A infection, and their parents or legal guardians were the subjects of the study. The survey was conducted using a structured questionnaire based on the Health Belief Model, and examined the subjects' demographics, knowledge, and health beliefs (i.e., perceived susceptibility, severity, benefits, and barriers). Results: We included 157 adolescents and their parents/guardians (mean age: $16.0{\pm}1.6$ and $45.6{\pm}4.7$ years, respectively). The average knowledge item score for adolescents and parents was $6.4{\pm}3.7$ and $7.3{\pm}3.4$ (out of 18), respectively. Similarly, average Health Belief Model item scores were: susceptibility, $5.6{\pm}1.6$ and $5.9{\pm}1.7$ (range: 2-10); severity, $16.3{\pm}4.1$ and $18.3{\pm}3.6$ (range:5-25); benefits, $19.7{\pm}3.3$ and $20.6{\pm}2.1$ (range:5-25); and barriers, $41.3{\pm}8.9$ and $39.0{\pm}9.1$ (range:7-85). The major reason for not undergoing hepatitis A vaccination was lack of knowledge about its importance. Conclusions: Refresher health lectures about hepatitis A and the vaccine are needed by both the adolescents and their parents. Furthermore, the inclusion of hepatitis A vaccine in the national immunization program should be considered to reduce the risk of hepatitis A outbreak and to raise the vaccination coverage among the adolescents in Korea.

• Pediatric Infection and Vaccine
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• v.4 no.2
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• pp.232-239
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• 1997

Purpose: The incidence of hepatitis A virus(HAV) infection has markedly decreased in the last 20 years due to industrialization and improvements in the standard of living and hygiene in Korea. The reduction in seroprevalence rates indicates infection potential for young adult population, and a need for vaccinations in high-risk adults and children groups has been suggested. In this study we evaluated the seroprevalence rates and natural infection rates of hepatitis A in children and adolescent to obtain the basic data for vaccination of hepatitis A. Methods: A total of 334 children and adolescent subjects below 20 years old in Kyonggi-do province were examined for HAV antibody and seroprevalence rates in each age group was investigated. In 584 elementary school students residing in Kyonggi-do province, serum samples collected in 1993 and 1996 from the same subjects for investigation of natural seroconversion rates. Method of testing antibody was enzyme immunoassay. Results: 1) The seropositive rate of HAV in 334 subjects aged below 20 years old was 5.4%. According to age, the seropositive rates were 27.3% in infant group, 0.0% in 1~4 year-old group, 0.0% in 5~9 year-old group, 2.9% in 10~14 year-old group and 15.0% in 15~19 year-old group. 2) In the study of 584 elementary school children, only one subject showed seropositive in 1993, and in 1996 three different subjects showed seropositive results(0.5%); the natural seroconversion rate during 3 years was 0.5%. 3) The seroprevalence rates of below 20 year-old subjects reported in previous studies were 63.8% in 1979 and 47.3% in 1989 while the present study showed the rate at 5.4%. Conclusion: Since natural antibody formation is rarely occurring, there is a high risk for apparent hepatitis A infection in adults. Therefore vaccination in high risk groups is essential at present, and in order to reduce the chance for hepatitis A infection in adults, vaccination in children may be needed.

• Pediatric Infection and Vaccine
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• v.7 no.1
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• pp.120-128
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• 2000

Purpose : Active immunization against hepatitis A with an inactivated vaccine reveals excellent immunogenicity, tolerability and protective efficacy. Inactivated hepatitis A vaccines have been selectively used since 1996 in Korea to prevent hepatitis A. This study was performed to assess the immunogenicity and reactogenicity after two doses of HM175 strain hepatitis A vaccine in healthy Korean children. Methods : 128 healthy children(M/F; 65/63) aged 1 to 15 years, who were seronegative for hepaitatis A, participated in this study. A alum-adsorbed vaccine containing 720 EL.U of antigen form HM175 hepatitis A strain per 0.5 mL dose was injected intramuscularly on the deltoid area. The second dose was given 6 months later, Anti-HAV antibodies were measured by ELISA before and 1 month after each vaccination to assess the immunogenicity. Any local and general adverse events were reported by patients parents with the prepared questionnaire after each vaccination. Results : 120 volunteers(M/F; 60/60) completed the whole series of the study. Seroconversion occurred in all cases after primary and booster vaccination. The mean anti-HAV antibody titer after primary vaccination was 389.2mIU/mL, and 3,609mIU/mL after booster vaccination. And levels of anti-HAV antibodies after booster immunization were significantly higher in female children. The most common local adverse event was soreness on the injection site, but it was mild and resolves within 3 days. Fever was not reported after booster vaccination. Conclusion : Based on these data, we conclude that the inactivated HM175 strain hepatitis A vaccine is highly immunogenic and tolerable in healthy Korean children.