- A case-control study of acute hepatitis A in South Korea, 2019
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Jung Hee Hyun, Ju Young Yoon, Sang Hyuk Lee
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Osong Public Health Res Perspect. 2022;13(5):352-359. Published online October 12, 2022
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DOI: https://doi.org/10.24171/j.phrp.2022.0141
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 Graphical Abstract
 Abstract
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 - Objectives
We aimed to reconfirm the source of hepatitis A virus (HAV) infection through epidemiological and genotype investigations of individual cases in a 2019 outbreak in South Korea. Methods: We investigated food intake histories, associations with hepatitis A, and genotypes of HAV in 31 patients with hepatitis aged 20 to 49 years registered in the integrated disease and health management system during December 1–7, 2019 (case group) and in 35 sex- and agematched people without a history of HAV vaccination or infection among patients’ families and colleagues (control group). Results: The consumption of salted clams was a significant factor (odds ratio, 4.33; 95% confidence interval, 1.32–14.18) in the risk factor analysis of food intake history. HAV genotypes were analyzed in 24 of 31 patients. Type IA and type IIIA were found in 23 and 1 cases, respectively. Conclusion: Salted clams are considered to have been the source of HAV infection at 49 weeks of the HAV outbreak in 2019; this result was consistent with that of a previous epidemiological investigation conducted by the Korea Disease Control and Prevention Agency in September 2019. Therefore, monitoring of the production and distribution of salted clams needs to be continued.
- Trends in recent waterborne and foodborne disease outbreaks in South Korea, 2015–2019
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Sang Hyuk Lee, Jae-Won Yun, Ji Hee Lee, Yeon Haw Jung, Dong Han Lee
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Osong Public Health Res Perspect. 2021;12(2):73-79. Published online April 29, 2021
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DOI: https://doi.org/10.24171/j.phrp.2021.12.2.04
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Abstract
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- Objectives
This study analyzed trends in foodborne and waterborne diseases in South Korea between 2015 and 2019.
Methods
The data consisted of information on outbreaks of waterborne and foodborne infectious diseases reported through the Korea Centers for Disease Control and Prevention (KCDC) system. We analyzed the trends and epidemiological aspects of outbreaks by month, place of occurrence, and causative pathogens in this observational study.
Results
The number of outbreaks has steadily increased over the last 5 years, but the number of cases per outbreak has followed a decreasing trend. Incidence at daycare centers and preschools has been steadily increasing over consecutive years.
Conclusion
The steady number of patients and decreasing number of cases per outbreak, even as the number of outbreaks has been increasing, suggest that the KCDC’s professional management system is operating effectively. It is necessary to continue improving the objectivity and efficiency of the management system and to carefully examine the increasing number of outbreaks in smaller-scale group catering facilities, such as daycare centers and preschools. Outbreaks can be prevented by closely examining those caused by unidentified pathogens and group outbreaks caused by other diseases, identifying problems, and supplementing the management system.
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Citations
Citations to this article as recorded by  - Ultrasensitive quantification of pathogens in milliliters of beverage by filtration-based digital LAMP
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Soyeoun Kim, Jinhyun Kim, Bo Youl Choi, Boyoung Park
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Md-Mafizur Rahman, Sang-Jin Lim, Yung-Chul Park
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