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- 저자 : Sukhyun Ryu (검색결과 5 건)
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Community-acquired Legionnaires' Disease in a Newly Constructed Apartment Building
Ryu, Sukhyun,Yang, Kyungho,Chun, Byung Chul The Korean Society for Preventive Medicine 2017 Journal of Preventive Medicine and Public Health Vol.50 No.4
Objectives: Legionnaires' disease (LD) is a severe type of pneumonia caused by inhalation of aerosols contaminated with Legionella. On September 22, 2016, a single case of LD was reported from a newly built apartment building in Gyeonggi province. This article describes an epidemiologic investigation of LD and identification of the possible source of infection. Methods: To identify the source of LD, we interviewed the patient's husband using a questionnaire based on the Legionella management guidelines from the Korea Centers for Disease Control and Prevention. Water samples from the site were collected and analyzed. An epidemiological investigation of the residents and visitors in the apartment building was conducted for 14 days before the index patient's symptoms first appeared to 14 days after the implementation of environmental control measures. Results: Legionella pneumophila serogroup 1 was isolated from the heated-water samples from the patient's residence and the basement of the apartment complex. Thirty-two suspected cases were reported from the apartment building during the surveillance period, yet all were confirmed negative based on urinary antigen tests. Conclusions: The likely source of infection was the building's potable water, particularly heated water. Further study of effective monitoring systems in heated potable water should be considered.
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One Health Perspectives on Emerging Public Health Threats
Ryu, Sukhyun,Kim, Bryan Inho,Lim, Jun-Sik,Tan, Cheng Siang,Chun, Byung Chul The Korean Society for Preventive Medicine 2017 예방의학회지 Vol.50 No.6
Antimicrobial resistance and emerging infectious diseases, including avian influenza, Ebola virus disease, and Zika virus disease have significantly affected humankind in recent years. In the premodern era, no distinction was made between animal and human medicine. However, as medical science developed, the gap between human and animal science grew deeper. Cooperation among human, animal, and environmental sciences to combat emerging public health threats has become an important issue under the One Health Initiative. Herein, we presented the history of One Health, reviewed current public health threats, and suggested opportunities for the field of public health through better understanding of the One Health paradigm.
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An interim review of the epidemiological characteristics of 2019 novel coronavirus
Sukhyun Ryu,Byung Chul Chun,Korean Society of Epidemiology 2019-nCoV Task Force Team 한국역학회 2020 Epidemiology and Health Vol.42 No.-
OBJECTIVES: The 2019 novel coronavirus (2019-nCoV) from Wuhan, China is currently recognized as a public health emergency of global concern. METHODS: We reviewed the currently available literature to provide up-to-date guidance on control measures to be implemented by public health authorities. RESULTS: Some of the epidemiological characteristics of 2019-nCoV have been identified. However, there remain considerable uncertainties, which should be considered when providing guidance to public health authorities on control measures. CONCLUSIONS: Additional studies incorporating more detailed information from confirmed cases would be valuable.
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Interpretation of the Basic and Effective Reproduction Number
Lim Jun-Sik,Cho Sung-il,Ryu Sukhyun,박선일 대한예방의학회 2020 Journal of Preventive Medicine and Public Health Vol.53 No.6
In epidemiology, the basic reproduction number (R0) is a term that describes the expected number of infections generated by 1 case in a susceptible population. At the beginning of the coronavirus disease 2019 (COVID-19) pandemic, R0 was frequently referenced by the public health community and the wider public. However, this metric is often misused or misinterpreted. Moreover, the complexity of the process of estimating R0 has caused difficulties for a substantial number of researchers. In this article, in order to increase the accessibility of this concept, we address several misconceptions related to the threshold characteristics of R0 and the effective reproduction number (Rt). Moreover, the appropriate interpretation of the metrics is discussed. R0 should be considered as a population-averaged value that pools the contact structure according to a stochastic transmission process. Furthermore, it is necessary to understand the unavoidable time lag for Rt due to the incubation period of the disease.
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The Delay in Confirming COVID-19 Cases Linked to a Religious Group in Korea
Hyung-Ju Kim,Hyun-Seong Hwang,Yong-Hyuk Choi,Hye-Yeon Song,Ji-Seong Park,Chae-Young Yun,Sukhyun Ryu 대한예방의학회 2020 Journal of Preventive Medicine and Public Health Vol.53 No.3
Objectives: As of March 3, 2020, the Shincheonji religious group accounted for the majority of Korean cases of coronavirus disease 2019 (COVID-19). Nonetheless, the most likely cause of the broad spread of COVID-19 among members of the Shincheonji religious group remains largely unknown. Methods: We obtained data of laboratory-confirmed cases related to the Shincheonji religious group from press releases by Korean public health authorities and news reports. We measured the period from the date of illness onset to the date of COVID-19 confirmation. Results: We analysed data from 59 cases (median age, 30 years). The estimated median period between the date of symptom onset and the date of COVID-19 confirmation was 4 days (95% confidence interval, 1-12). Conclusions: There was a delay in COVID-19 confirmation from the date of illness onset among the cases linked to the Shincheonji religious group. This delay likely contributed to the occurrence of many cases of COVID-19 in the group.
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