Osong Public Health and Research Perspectives

Ji-Hyuk Park

5 Articles

COVID-19 outbreak and risk factors for infection in a taekwondo gym in the Republic of Korea: Seung Hwan Shin, Eonjoo Park, Sookhyun Kim, Minji Jang, Subin Park, Dong-Hwi Kim, Tae Jong Son, Ji-Hyuk Park; Osong Public Health Res Perspect. 2022;13(2):162-170. Published online March 31, 2022; DOI: https://doi.org/10.24171/j.phrp.2021.0295

644 View
45 Download

Abstract PDF: Objectives
Relatively few studies have assessed risk factors for coronavirus disease 2019 (COVID-19) in public facilities used by children and adolescents. This study presents an analysis of a COVID-19 outbreak that occurred in a taekwondo gym in Korea, predominantly among children and adolescents, with the aim of providing insights on managing COVID-19 outbreaks in similar facilities. Methods: All 108 taekwondo gym students and staff received COVID-19 tests. A survey and closed-circuit television analyses were used to identify risk factors. A univariate analysis was conducted, followed by multivariate logistic regression analysis with backward elimination for variables with a significance level <0.10 in the univariate analysis. Results: COVID-19 was confirmed in 30 of 108 subjects at the taekwondo gym (attack rate, 27.8%). The outbreak started in an adult class student. This student transmitted the virus to the staff, who consequently transmitted the virus to adolescent students. In the univariate analysis, the relative risk for younger age (≤9 years) was 2.14 (95% confidence interval [CI], 1.01–4.54; p=0.054), and that for food consumption inside the gym was 2.12 (95% CI, 1.04–4.30; p=0.048). In the multivariate logistic regression analysis, the odds ratio for younger age was 2.96 (95% CI, 1.07–8.20; p=0.036), and that for food consumption inside the gym was 3.00 (95% CI, 1.10–8.17; p=0.032). Conclusion: Food consumption inside the facility and young age were significant risk factors for COVID-19 transmission in this taekwondo gym. Food consumption should be prohibited in sports facilities, and infection prevention education for young students is also required.

COVID-19 in Nursing Facilities: Experience in Republic of Korea: Rok Song, Hee-Sook Kim, Seok-Ju Yoo, Kwan Lee, Ji-Hyuk Park, Joon Ho Jang, Gyoung-Sook Ahn, Jun-Nyun Kim; Osong Public Health Res Perspect. 2020;11(4):164-169. Published online August 31, 2020; DOI: https://doi.org/10.24171/j.phrp.2020.11.4.04

4,103 View
123 Download
4 Citations

Abstract PDF: Objectives
Coronavirus disease 2019 (COVID-19) outbreaks in nursing facilities can easily lead to a high rate of infection and fatality. A surge in newly infected cases in the first quarter of 2020 in Gyeongsan-si, in the Republic of Korea, was followed by several outbreaks in nursing facilities in the same area. The aim of this study is to report on the epidemiological investigation and the management to reduce the infection rate in nursing facilities for older adults.
Methods
The municipal government and the Korea Centers for Disease Control and Prevention performed an epidemiological investigation into 5 nursing facilities that reported a high number of COVID-19 infection cases from February to May 2020. COVID-19 infected cases in the facilities were investigated to identify the infection routes, and the fatality rate of the 5 facilities.
Results
The 5 facilities had a combined fatality rate of 12.2% (9 deceased among the 74 infected cases). The median age of the deceased was 87 years old (range: 82–91). The infection was first identified on February 27^th, 2020, peaked on March 6^th, and was last detected on March 24^th, 2020.
Conclusion
Difficulties specific to such facilities included the delay in the recognition of symptoms and limitation in distancing. Tailored strategies such as daily monitoring of symptoms and proactive COVID-19 screening of quarantined residents, contributed to a decline in the infections in the facilities.

Necessity of a Surveillance System for Tick-borne Encephalitis: Seok-Ju Yoo, Ji-Hyuk Park; Osong Public Health Res Perspect. 2017;8(2):155-155. Published online April 30, 2017; DOI: https://doi.org/10.24171/j.phrp.2017.8.2.08

1,756 View
22 Download
2 Citations

PDF

Emerging Pathogens and Vehicles of Food- and Water-borne Disease Outbreaks in Korea, 2007–2012: Shinje Moon, Il-Woong Sohn, Yeongseon Hong, Hyungmin Lee, Ji-Hyuk Park, Geun-Yong Kwon, Sangwon Lee, Seung-Ki Youn; Osong Public Health Res Perspect. 2014;5(1):34-39. Published online February 28, 2014; DOI: https://doi.org/10.1016/j.phrp.2013.12.004

1,445 View
16 Download
13 Citations

Abstract PDF: Objectives
Food- and water-borne disease outbreaks (FBDOs) are an important public health problem worldwide. This study investigated the trends in FBDOs in Korea and established emerging causal pathogens and causal vehicles.
Methods
We analyzed FBDOs in Korea by year, location, causal pathogens, and causal vehicles from 2007 to 2012. Information was collected from the FBDOs database in the Korean Centers for Disease Control and Prevention.
Results
During 2007–2012, a total of 1794 FBDOs and 48,897 patients were reported. After 2007, FBDOs and patient numbers steadily decreased over the next 2 years and then plateaued until 2011. However, in 2012, FBDOs increased slightly accompanied by a large increase in the number of affected patients. Our results highlight the emergence of norovirus and pathogenic Escherichia coli other than enterohemorrhagic E. coli (EHEC) in schools in 2012. We found that pickled vegetables is an emerging causal vehicle responsible for this problem.
Conclusion
On the basis of this study we recommend intensified inspections of pickled vegetable manufacturers and the strengthening of laboratory surveillance of relevant pathogens.

Epidemiological Characteristics of Serologically Confirmed Q Fever Cases in South Korea, 2006–2011: Wooseok Kwak, Hyuk Chu, Seondo Hwang, Ji-Hyuk Park, Kyu Jam Hwang, Jin Gwack, Young-Sil Choi, Seung-Ki Youn, Mi-Yeoun Park; Osong Public Health Res Perspect. 2013;4(1):34-38. Published online February 28, 2013; DOI: https://doi.org/10.1016/j.phrp.2012.12.006

1,721 View
15 Download
20 Citations

Abstract PDF: Objectives
Q fever has been reported worldwide; however, there was almost no official report of Q fever in Korea. In this study, we describe the current status of human Q fever occurrence in Korea.
Methods
Demographic data of Q fever patients were collected from the National Notifiable Diseases Surveillance System from 2006 to 2011. Case investigation reports from regional public health departments were used for additional information, like risk factors and clinical manifestation, of the patients since 2008.
Results
There were 65 serologically confirmed cases during the study period. The annual notification rate of Q fever was 0.22 cases per million persons. The majority of cases were men (87.7%), adults (98.5%), and urban inhabitants (67.7%). Relevant exposures to risk factors were identified in 45.7% of patients. The most common symptoms of acute Q fever were fever (89.3%), myalgia (67.9%) and asthenia (53.6%). Two cases with endocarditis were identified in chronic Q fever.
Conclusion
This study suggests that Q fever has a low endemicity in Korea. However, management and research at national level is required for prevention of a future epidemic.

Author index