Nationwide Seropositivity of Hepatitis A in Republic of Korea from 2005 to 2014, before and after the Outbreak Peak in 2009
Autor: | Anna Lee, Kyung-Ah Kim, Moran Ki, Sook Hyang Jeong |
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Rok vydání: | 2017 |
Předmět: |
Male
Gastroenterology and hepatology viruses lcsh:Medicine Hepatitis A Antibodies Geographical locations Disease Outbreaks Hepatitis 0302 clinical medicine Seroepidemiologic Studies Public and Occupational Health 030212 general & internal medicine lcsh:Science Child Pathology and laboratory medicine Geographic Areas Multidisciplinary Geography virus diseases Hepatitis A Middle Aged Medical microbiology Vaccination and Immunization Infectious hepatitis Serology Cohort effect Child Preschool Viruses Infectious diseases Population study Female 030211 gastroenterology & hepatology Pathogens Research Article Adult Asia Adolescent Immunology Viral diseases Microbiology Young Adult 03 medical and health sciences South Korea Republic of Korea medicine Humans Seroprevalence Liver diseases Retrospective Studies Demography Medicine and health sciences Standard Population Biology and life sciences business.industry lcsh:R Infant Newborn Viral pathogens Organisms Immunity Infant Outbreak Retrospective cohort study medicine.disease Hepatitis viruses Rural Areas Microbial pathogens Earth Sciences lcsh:Q Hepatitis A virus Preventive Medicine People and places business |
Zdroj: | PLoS ONE PLoS ONE, Vol 12, Iss 1, p e0170432 (2017) |
ISSN: | 1932-6203 |
Popis: | Background/Aims The epidemiologic shift of hepatitis A virus (HAV) infection in the South Korean population resulted in a peak outbreak of hepatitis in 2009. The aim of this study was to clarify the seropositivity of anti-HAV antibody (anti-HAV) and its demographic characteristics before and after the peak outbreak from 2005 to 2014. Methods This retrospective study analyzed the anti-HAV data of all individuals from 1,795 medical institutions referred to a major central laboratory from January 2005 through December 2014, as a sentineal tool for monitoring annual variation of anti-HAV positivity. The prevalence of anti-HAV was adjusted for age and area with the standard population based on the 2010 Census data. Results A total of 424,245 individuals were included in this study. The overall age-adjusted anti-HAV prevalence decreased from 65.6% in 2005 to 62.2% in 2014. During the 10-year period, the seroprevalence continuously decreased in persons aged 30 to 39 years (69.6% to 32.4%) and those aged 40 to 49 years (97.9% to 79.3%) due to the cohort effect. In contrast, it increased in persons aged 10 to 19 years (15.4% to 35.2%), while it was the lowest (8.7%) in 2010 before rebounding to 20.2% in 2014 in persons aged 20 to 29 years due to a vaccination effect. Conclusion Although the HAV vaccination rate increased, the anti-HAV seropositivity in South Korea decreased from 65.6% to 62.2% in this study population. In particular, the immunity of young adults was still low, and an outbreak of HAV is possible in the near future. Therefore, continuous monitoring and optimal preventive measures to prevent future outbreaks should be considered. |
Databáze: | OpenAIRE |
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