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Young-Kwon Kim 4 Articles
The effect of photodynamic therapy using Radachlorin on biofilm-forming multidrug-resistant bacteria
Choong-Won Seo, Young-Kwon Kim, Jeong-Lib An, Jong-Sook Kim, Pil-Seung Kwon, Young-Bin Yu
Osong Public Health Res Perspect. 2022;13(4):290-297.   Published online August 10, 2022
DOI: https://doi.org/10.24171/j.phrp.2022.0150
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AbstractAbstract PDF
Objectives
This study aimed to test the effect of photodynamic therapy (PDT) on the inhibition and removal of biofilms containing multidrug-resistant Acinetobacter baumannii.
Methods
Using multidrug-resistant A. baumannii strains, an antibiotic susceptibility test was performed using the Gram-negative identification card of the Vitek 2 system (bioMérieux Inc., France), as well as an analysis of resistance genes, the effects of treatment with a light-emitting diode (LED) array using Radachlorin (RADA-PHARMA Co., Ltd., Russia), and transmission and scanning electron microscopy to confirm the biofilm-inhibitory effect of PDT.
Results
The antibiotic susceptibility test revealed multiple resistance to the antibiotics imipenem and meropenem in the carbapenem class. A class-D–type β-lactamase was found, and OXA-23 and OXA-51 were found in 100% of 15 A. baumannii strains. After PDT using Radachlorin, morphological observations revealed an abnormal structure due to the loss of the cell membrane and extensive morphological changes, including low intracellular visibility and small vacuoles attached to the cell membrane.
Conclusion
PDT involving a combination of LED and Radachlorin significantly eliminated the biofilm of multidrug-resistant A. baumannii. Observations made using electron microscopy showed that PDT combining LED and Radachlorin was effective. Additional studies on the effective elimination of biofilms containing multidrug-resistant bacteria are necessary, and we hope that a treatment method superior to sterilization with antibiotics will be developed in the future.
Corrigendum to “Epidemiological Characterization of Imported Systemic Mycoses Occurred in Korea” [Osong Public Health Res Perspect 2018;9(5):255–60]
Seung-Hak Cho, Young-Bin Yu, Je-Seop Park, Keun-Dol Yook, Young-Kwon Kim
Osong Public Health Res Perspect. 2018;9(6):362-362.   Published online December 31, 2018
DOI: https://doi.org/10.24171/j.phrp.2018.9.6.11
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Epidemiological Characterization of Imported Systemic Mycoses Occurred in Korea
Seung-Hak Cho, Young-Bin Yu, Je-Seop Park, Keun-Dol Yook, Young-Kwon Kim
Osong Public Health Res Perspect. 2018;9(5):255-260.   Published online October 31, 2018
DOI: https://doi.org/10.24171/j.phrp.2018.9.5.07
  • 8,861 View
  • 114 Download
  • 3 Citations
AbstractAbstract PDF
Objectives

Imported systemic mycoses is a severe fungal infection that can cause diseases in healthy people. However, there is a serious lack of epidemiological data about imported systemic mycoses. Therefore, an epidemiological characterization of imported systemic mycoses in Korea was performed.

Methods

We collected health insurance data between 2008 and 2012 from the Health Insurance Corporation and analyzed the data to determine the prevalence and treatment management of imported systemic mycoses.

Results

The prevalence of imported systemic mycoses between 2008 and 2012 increased slowly by 0.49/100,000 to 0.53/100,000 persons. The prevalence of coccidioidomycosis increased from 0.28/100,000 in 2008 to 0.36/100,000 persons in 2012. A mean of 229.6 cases occurred each year. Children and the elderly showed higher prevalence than adults in the 20- to 59-year-old age group. The rate of infection according to region ranged from 0.18/100,000 persons in Ulsan, to 0.59/100,000 persons in Gyeonggi. The prevalence in females was higher than that in males. Inpatient treatment was 3.3% (38 cases), with 96.7% treated as outpatients. Hospitalizations cost 272.7 million won and outpatient treatments cost 111.7 million won. The treatment cost for coccidioidomycosis from 2008 to 2012 was 330.9 million won, with personal charges of 79.2 million won and insurance charges of 251.7 million won. Most of the expenses for the coccidioidomycosis treatment were for inpatient treatment.

Conclusion

The results in this study may be a useful resource for determining the changes in the trend of imported systemic mycoses.

Trends in the Incidence of Scrub Typhus: The Fastest Growing Vector-Borne Disease in Korea
Mi Ae Jeong, Seung-Ki Youn, Young-Kwon Kim, Hyungmin Lee, Sun-Ja Kim, Aeree Sohn
Osong Public Health Res Perspect. 2013;4(3):166-169.   Published online June 30, 2013
DOI: https://doi.org/10.1016/j.phrp.2013.04.007
  • 1,669 View
  • 20 Download
  • 14 Citations
AbstractAbstract PDF
Scrub typhus, also called tsutsugamushi disease, is classified as a Group 3 disease in Korea according to the National Notifiable Diseases Surveillance Systems. It is an infectious disease transmitted to humans through the bite of mites that are infected with an intracellular parasite called Orientia tsutsugamushi (Family: Rickettsiaceae). This study aims to identify the demographic characteristics of the infected cases according to profession, region, gender, and onset period and provide a basic data for prevention and control of the disease in the infected patients. Between 2001 and 2010, 16,741 men (36.3%) and 29,373 women (63.7%) were reported to have been infected with scrub typhus, with men being 1.6 times less infected than women. When classified according to age, it was found that 4421 persons (9.6%) were under 40 years of age; 6601 (13.1%) in their 40s; 9714 (21.1%) in their 50s; 13,067 (28.3%) in 60s; 10,128 (22.0%) in their 70s; and 2723 (5.9%) aged 80 or more. The elderly (60 years or older) represented more than half of the infected cases. When the infections were classified according to region, it was found that the county residents had the major share of infection, with a total of 1583 infected cases (59.85).

PHRP : Osong Public Health and Research Perspectives