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2018~2022년 경기 해안지역에서 분리된 비브리오패혈증균의 월별 분포 특성
윤수정,편희수,이윤희,박소정,강경자,허은선,정일형,김범호,권순목 한국환경보건학회 2024 한국환경보건학회지 Vol.50 No.1
Background: Vibrio vulnificus is a serious opportunistic human pathogen that has a worldwide distribution in a variety of marine and estuarine environments. Objectives: For this reason, we investigated the distribution of Vibrio vulnificus in coastal areas of Gyeonggido Province from 2018 to 2022. Also, we analyzed the correlation between V. vulnificus leading to infection and two marine environmental factors (water temperature and salinity). Methods: We collected a total of 266 samples from six coastal area points (i.e., seawater, mudflats). Specimens were isolated using selective plating media and isolated strains were identified by a VITEK 2 system. To find the relevance of the isolation rates of V. vulnificus and number of cases of V. vulnificus infection, we summarized the data on 48 cases of V. vulnificus infection from the open data of the Korea Disease Control and Prevention Agency. Results: Among the 266 samples taken during the investigation period, 47 strains were isolated, and the separation rates of V. vulnificus were 17.7%. The monthly isolation rates of V. vulnificus were ranked in the order of August (53.8%), September (33.3%), June (28.6%), and July (21.1%). There was a positive correlation with the temperature of seawater, but salinity was not significant. The number of cases of V. vulnificus infection reported in Gyeonggi-do Province were 18 (37.5%) in September, 14 (29.2%) in August, and eight (16.7%) in October. The proportion was 83.3%. It was relevant to the isolation rates of V. vulnificus in the marine environmental sources. Conclusions: Our data showed that the number of V. vulnificus infection cases could be affected by changes in the distribution of V. vulnificus due to rise the temperature of seawater in the marine environment.
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의료기관 유형에 따른 카바페넴내성장내세균속균종(CRE) 감염증 발생 고찰
윤수정,권순목,허은선,박소정,이윤희,편희수,정일형 대한의료관련감염관리학회 2022 의료관련감염관리 Vol.27 No.2
Background: Carbapenem-resistant Enterobacterales (CRE) are increasing rapidly worldwide, posing a major threat to global health. This study aimed to identify the epidemiological characteristics of CRE isolated in Gyeonggi-do according to hospital type. Methods: We conducted antibiotic susceptibility and genetic tests for carbapenemase-producing Enterobacterales (CPE) among 1,243 clinical isolates of CRE from Gyeonggi-do in 2019. CRE strains were identified using MALDI-TOF (Microflex, BRUKER, Germany), and antimicrobial susceptibility tests were performed using the broth microdilution method, according to the CLSI guidelines. Genetic testing of the CPE type was performed for KPC, NDM, OXA-48, IMP, VIM, and GES. Results: Most CRE infections in Gyeonggi-do occurred in general hospitals (60.9%) and long-term care hospitals (27.8%). While the proportion of the CPE group in general hospitals was low (55.7%), 85.0% of CRE isolates in long-term care hospitals were identified in the CPE group. In the CPE group, the proportion of CRE isolates above the minimum inhibitory concentration of carbapenem namely meropenem, imipenem, and doripenem was 76.0%, 90.2%, and 66.5%, respectively. The non-CPE group showed a relatively low resistance percentage (44.6% [meropenem], 27.6% [imipenem], and 25.2% [doripenem]) compared to the CPE group. Furthermore, we found a correlation between CPE genes and carbapenem resistance rate on the Kruskal–Wallis test (P≤0.05). Conclusion: Carbapenem resistance rate and the genetic characteristics of CRE isolates differed according to the type of hospital in which they occurred. The high proportion of the CPE group in long-term care hospitals indicates the need for more attention to strict infection control in these hospitals.
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Trends in Norovirus Distribution among the Children of Childcare Center
허은선,정일형,권순목,Min-Sung Kang,박소정,이윤희,편희수,Bum-Ho Kim,Yong-Bae Park 대한미생물학회 2023 Journal of Bacteriology and Virology Vol.53 No.1
Noroviruses are pathogens as being the leading cause of acute gastroenteritis (AGE) across all age groups, especially among vulnerable population, less than 5 years old. This study examined a total of 994 specimens collected from 58 cases of the kindergartens populations in Gyeonggi-Do from 2019 to 2021 to estimate the incidence of viral enteropathogens and analyze molecular genetic characteristics. Noroviruses were the most common viral pathogen causing among these population with acute gastroenteritis (n=55, 94.8% of cases tested). We found that norovirus outbreak of kindergarten exhibited a seasonality from the winter to summer with a peak in April. In particular, genotype GII noroviruses were particularly prevalent in the kindergarten population, with GII-4/2012 being highly detected in 119 specimens, followed by GII-3 and GII-2 as pathogenic agents causing AGE. Samples from workers or environment (toilet, doorknob, toy) were positive for a same genetic norovirus (GII-4/2012). Our results suggest that special attention needs to be paid to any possible contamination with noroviruses. Furthermore, a regular monitoring system can help prevent the norovirus outbreaks.
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