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Choi YJ, Kim YA, Junglim K, Jeong SH, Shin JH, Shin KS, Shin JH, Kim YR, Kim HS, Uh Y, Ryoo NH. Erratum: Emergence of NDM-1-producing Pseudomonas aeruginosa Sequence Type 773 Clone: Shift of Carbapenemase Molecular Epidemiology and Spread of 16S rRNA Methylase Genes in Korea. Ann Lab Med 2023; 43:398. [PMID: 36843412 PMCID: PMC9989531 DOI: 10.3343/alm.2023.43.4.398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
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Kim YK, Yu WS, Kim S, Ryoo NH, Lee JC, Kwon KT, Lee NY, Lee DE, Hwang HR. First Case of Pseudoclavibacter alba Bacteremia in a Patient with Cholangitis. Clin Lab 2023; 69. [PMID: 37307109 DOI: 10.7754/clin.lab.2022.221004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Pseudoclavibacter alba isolated from human urine in culture collection was introduced as a new species, but since then, no other reports on P. alba isolated from the environment or organisms have been published. We thus present the first case report of P. alba bacteremia. METHODS An 85-year-old female patient was admitted with intermittent abdominal pain and chills that had persisted for one week. She was diagnosed cholangitis with common bile duct stones. RESULTS Gram-positive bacteria were detected in her peripheral blood culture and identified Pseudoclavibacter species by matrix-assisted laser desorption-ionization-time of flight mass spectrometry. Pseudoclavibacter alba was identified by performing the 16S ribosomal RNA gene sequence. CONCLUSIONS This is the first case report of P. alba bacteremia in a patient with cholangitis.
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Bae MH, Kim MS, Kim TS, Kim S, Yong D, Ha GY, Ryoo NH, Uh Y, Shin JH, Lee HS, Sohn YH, Shin S, Kim MN. Changing Epidemiology of Pathogenic Bacteria Over the Past 20 Years in Korea. J Korean Med Sci 2023; 38:e73. [PMID: 36918027 PMCID: PMC10010907 DOI: 10.3346/jkms.2023.38.e73] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/14/2022] [Indexed: 03/05/2023] Open
Abstract
BACKGROUND The epidemiology of pathogenic bacteria varies according to the socioeconomic status and antimicrobial resistance status. However, longitudinal epidemiological studies to evaluate the changes in species distribution and antimicrobial susceptibility of pathogenic bacteria nationwide are lacking. We retrospectively investigated the nationwide trends in species distribution and antimicrobial susceptibility of pathogenic bacteria over the last 20 years in Korea. METHODS From 1997 to 2016, annual cumulative antimicrobial susceptibility and species distribution data were collected from 12 university hospitals in five provinces and four metropolitan cities in South Korea. RESULTS The prevalence of Staphylococcus aureus was the highest (13.1%) until 2012 but decreased to 10.3% in 2016, consistent with the decrease in oxacillin resistance from 76.1% in 2008 to 62.5% in 2016. While the cefotaxime resistance of Escherichia coli increased from 9.0% in 1997 to 34.2% in 2016, E. coli became the most common species since 2013, accounting for 14.5% of all isolates in 2016. Pseudomonas aeruginosa and Acinetobacter baumannii rose to third and fifth places in 2008 and 2010, respectively, while imipenem resistance increased from 13.9% to 30.8% and 0.7% to 73.5% during the study period, respectively. Streptococcus agalactiae became the most common pathogenic streptococcal species in 2016, as the prevalence of Streptococcus pneumoniae decreased since 2010. During the same period, pneumococcal penicillin susceptibility decreased to 79.0%, and levofloxacin susceptibility of S. agalactiae decreased to 77.1% in 2016. CONCLUSION The epidemiology of pathogenic bacteria has changed significantly over the past 20 years according to trends in antimicrobial resistance in Korea. Efforts to confine antimicrobial resistance would change the epidemiology of pathogenic bacteria and, consequently, the diagnosis and treatment of infectious diseases.
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Affiliation(s)
- Mi Hyun Bae
- Department of Laboratory Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
| | - Min-Sun Kim
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Taek Soo Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Dongeun Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Gyoung Yim Ha
- Department of Laboratory Medicine, Dongguk University Gyeongju Hospital, Dongguk University College of Medicine, Gyeongju, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea
| | - Young Uh
- Department of Laboratory Medicine, Yonsei University Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea
| | - Hye Soo Lee
- Department of Laboratory Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea
| | - Yong-Hak Sohn
- Department of Laboratory Medicine, Eulji University Hospital, Eulji University School of Medicine, Daejeon, Korea
| | - Sue Shin
- Department of Laboratory Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Mi-Na Kim
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
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Choi YJ, Kim YA, Junglim K, Jeong SH, Shin JH, Shin KS, Shin JH, Kim YR, Kim HS, Uh Y, Ryoo NH. Emergence of NDM-1-producing Pseudomonas aeruginosa Sequence Type 773 Clone: Shift of Carbapenemase Molecular Epidemiology and Spread of 16S rRNA Methylase Genes in Korea. Ann Lab Med 2023; 43:196-199. [PMID: 36281514 PMCID: PMC9618910 DOI: 10.3343/alm.2023.43.2.196] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/29/2022] [Accepted: 09/14/2022] [Indexed: 12/27/2022] Open
Abstract
Imipenemase (IMP)-6-producing Pseudomonas aeruginosa sequence type (ST) 235 is a dominant clone of carbapenemase-producing P. aeruginosa (CPPAE) in Korea. As part of the Antimicrobial Resistance Surveillance System in Korea, we found an increase in the carbapenem resistance rate of P. aeruginosa isolates from blood cultures and a shift in the molecular epidemiology of CPPAE. A total of 212 non-duplicated P. aeruginosa blood isolates were obtained from nine general hospitals and two nursing homes. Twenty-four isolates were identified as CPPAE. We observed the emergence of the NDM-1 P. aeruginosa ST 773 clone (N=10), mostly from Gyeongsang Province. The IMP-6 ST 235 clone (N=11) was detected in all provinces. CPPAE isolates showed very high resistance rates to amikacin, and all NDM-1 P. aeruginosa strains carried rmtB. This is the first nationwide surveillance of the recently emerged NDM-1-producing P. aeruginosa ST773 clone in Korea. Continuous surveillance is necessary to prevent the infection and transmission of carbapenem- and amikacin-resistant P. aeruginosa in Korea.
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Affiliation(s)
- Yu Jeong Choi
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Young Ah Kim
- Department of Laboratory Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea,Corresponding author: Young Ah Kim, M.D. Department of Laboratory Medicine, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro, Ilsandong-gu, Goyang 10444, Korea Tel: +82-31-900-0908 Fax: +82-31-900-0912 E-mail:
| | - Kim Junglim
- Research Institute of Bacterial Resistance, Seoul, Korea
| | - Seok Hoon Jeong
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea,Research Institute of Bacterial Resistance, Seoul, Korea
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Kyeong Seob Shin
- Department of Laboratory Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
| | - Jeong Hwan Shin
- Department of Laboratory Medicine and Paik Institute for Clinical Research, Inje University College of Medicine, Busan, Korea
| | - Young Ree Kim
- Department of Laboratory Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Hyun Soo Kim
- Department of Laboratory Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
| | - Young Uh
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
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Hong KH, Kim GJ, Roh KH, Sung H, Lee J, Kim SY, Kim TS, Park JS, Huh HJ, Park Y, Kim JS, Kim HS, Seong MW, Ryoo NH, Song SH, Lee H, Kwon GC, Yoo CK. Update of Guidelines for Laboratory Diagnosis of COVID-19 in Korea. Ann Lab Med 2022; 42:391-397. [PMID: 35177559 PMCID: PMC8859556 DOI: 10.3343/alm.2022.42.4.391] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 01/25/2022] [Accepted: 02/07/2022] [Indexed: 11/19/2022] Open
Abstract
Korean Society for Laboratory Medicine and the Korea Disease Prevention and Control Agency have announced guidelines for diagnosing coronavirus disease (COVID-19) in clinical laboratories in Korea. With the ongoing pandemic, we propose an update of the previous guidelines based on new scientific data. This update includes recommendations for tests that were not included in the previous guidelines, including the rapid molecular test, antigen test, antibody test, and self-collected specimens, and a revision of the previous recommendations. This update will aid clinical laboratories in performing laboratory tests for diagnosing COVID-19.
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Affiliation(s)
- Ki Ho Hong
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Gab Jung Kim
- Bureau of Infectious Disease Diagnosis Control, the Korea Disease Control and Prevention Agency, Osong, Korea
| | - Kyoung Ho Roh
- Department of Laboratory Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Heungsup Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jaehyeon Lee
- Department of Laboratory Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea
| | - So Yeon Kim
- Department of Laboratory Medicine, National Medical Center, Seoul, Korea
| | - Taek Soo Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Korea
| | - Jae-Sun Park
- Bureau of Infectious Disease Diagnosis Control, the Korea Disease Control and Prevention Agency, Osong, Korea
| | - Hee Jae Huh
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Younhee Park
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Hyun Soo Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Moon-Woo Seong
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Sang Hoon Song
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Korea
| | - Hyukmin Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Gye Cheol Kwon
- Department of Laboratory Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Cheon Kwon Yoo
- Bureau of Infectious Disease Diagnosis Control, the Korea Disease Control and Prevention Agency, Osong, Korea
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Kim SH, Sung GH, Park EH, Hwang IY, Kim GR, Song SA, Lee HK, Uh Y, Kim YA, Jeong SH, Shin JH, Shin KS, Lee J, Jeong J, Kim YR, Yong D, Lee M, Kim YK, Ryoo NH, Lee S, Kim J, Kim S, Kim HS, Shin JH. Serotype Distribution and Antimicrobial Resistance of Salmonella Isolates in Korea between 2016 and 2017. Ann Lab Med 2022; 42:268-273. [PMID: 34635618 PMCID: PMC8548255 DOI: 10.3343/alm.2022.42.2.268] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/23/2021] [Accepted: 09/16/2021] [Indexed: 11/30/2022] Open
Abstract
Salmonella is one of the major causes of food-borne infections. We investigated the serotype distribution and antimicrobial resistance of Salmonella isolates collected in Korea between January 2016 and December 2017. In total, 669 Salmonella isolates were collected from clinical specimens at 19 university hospitals. Serotyping was performed according to the Kauffmann–White scheme, and antimicrobial susceptibility was tested using Sensititre EUVSEC plates or disk diffusion. Among the strains, C (39.8%) and B (36.6%) were the most prevalent serogroups. In total, 51 serotypes were identified, and common serotypes were S. enterica serovar I 4,[5],12:i:- (16.7%), S. Enteritidis (16.1%), S. Bareilly (14.6%), S. Typhimurium (9.9%), and S. Infantis (6.9%). The resistance rates to ampicillin, chloramphenicol, and trimethoprim-sulfamethoxazole were 32.6%, 12.1%, and 8.4%, respectively. The resistance rates to cefotaxime and ciprofloxacin were 8.1% and 3.0%, respectively, while 5.4% were multidrug-resistant. S. enterica serovar I 4,[5],12:i:- and S. Enteritidis were highly prevalent, and there was an increase in rare serotypes. Multidrug resistance and ciprofloxacin resistance were highly prevalent. Periodic investigations of Salmonella serotypes and antimicrobial resistance are needed.
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Affiliation(s)
- Si Hyun Kim
- Department of Clinical Laboratory Science, Semyung University, Jecheon, Korea
| | | | - Eun Hee Park
- Busan Institute of Health and Environment, Busan, Korea
| | | | - Gyu Ri Kim
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Sae Am Song
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Hae Kyung Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young Uh
- Department of Laboratory Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Young Ah Kim
- Department of Laboratory Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Seok Hoon Jeong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Kyeong Seob Shin
- Department of Laboratory Medicine, College of Medicine, Chungbuk National University, Cheongju, Korea
| | - Jaehyeon Lee
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
| | - Joseph Jeong
- Department of Laboratory Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Young Ree Kim
- Department of Laboratory Medicine, School of Medicine, Jeju National University, Jeju, Korea
| | - Dongeun Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea
| | - Miae Lee
- Department of Laboratory Medicine, Ewha Womans University College of Medicine, Seoul, Korea
| | - Yu Kyung Kim
- Department of Laboratory Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Seungok Lee
- Department of Laboratory Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
| | - Jayoung Kim
- Department of Laboratory Medicine, International St. Mary's Hospital, The Catholic Kwandong University College of Medicine, Incheon, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Hyun Soo Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Hwaseong, Korea
| | - Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea.,Paik Institute for Clinical Research, Inje University, Busan, Korea
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Chung HS, Park JS, Shin BM, Yoo HM, Kim H, Cho J, Lee CH, Ryoo NH, Kim JS, Chung JW, Hong KH, Kim YS, Cho YS. Nationwide Survey for Current Status of Laboratory Diagnosis of Clostridioides difficile Infection in Korea. J Korean Med Sci 2022; 37:e38. [PMID: 35132844 PMCID: PMC8822111 DOI: 10.3346/jkms.2022.37.e38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 12/15/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The interest in Clostridioides difficile infection (CDI) has increased, and the choice of assays became wider since the first national survey in Korea on CDI diagnosis in 2015. We conducted a survey of the domestic CDI assays with more varied questions to understand the current situation in Korea. METHODS In April 2018, about 50 questions on the current status of CDI assays and details on implementation and perceptions were written, and a survey questionnaire was administered to laboratory medicine specialists in 200 institutions. RESULTS One-hundred and fifty institutions responded to the questionnaire, of which 90 (60.0%) including one commercial laboratory, performed CDI assays. The toxin AB enzyme immunoassay (toxin AB EIA), nucleic acid amplification test (NAAT), and C. difficile culture, glutamate dehydrogenase assay, alone or in combination with other assays, were used in 75 (84.3%), 52 (58.4%), 35 (36.0%), and 23 (25.8%), respectively, and 65 (73.0%) institutions performed a combination of two or more assays. The sensitivity of toxin AB EIA was more negatively perceived, and that on specificity was more positively perceived. The perception of sensitivity and specificity of NAAT was mostly positive. Perception on the algorithm test projected it as useful but in need of countermeasures. Sixty-three (73.3%) institutions responded that they performed surveillance on CDI. CONCLUSION This study provides useful evidence on the current status of CDI laboratory diagnosis in Korea as well as on items that require improvement and is thought to aid in standardizing and improving the CDI laboratory diagnosis in Korea.
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Affiliation(s)
- Hae-Sun Chung
- Department of Laboratory Medicine, Ewha Womans University College of Medicine, Seoul, Korea
| | - Jeong Su Park
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Bo-Moon Shin
- Department of Laboratory Medicine, Sanggye Paik Hospital, School of Medicine, Inje University, Seoul, Korea.
| | - Hyeon Mi Yoo
- Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Heejung Kim
- Department of Laboratory Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
| | - Jihyun Cho
- Department of Laboratory Medicine, Wonkwang University Hospital, Iksan, Korea
| | - Chae Hoon Lee
- Department of Laboratory Medicine, College of Medicine, Yeungnam University, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - Jae-Woo Chung
- Department of Laboratory Medicine, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Ki Ho Hong
- Department of Laboratory Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - You Sun Kim
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Young-Seok Cho
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Park S, Chang SH, Lee JH, Lee JH, Ham JY, Kim YK, Kim SG, Ryoo NH. Serological evaluation of patients with coronavirus disease-2019 in Daegu, South Korea. PLoS One 2022; 17:e0262820. [PMID: 35051239 PMCID: PMC8775192 DOI: 10.1371/journal.pone.0262820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 01/05/2022] [Indexed: 01/08/2023] Open
Abstract
Background
Early and accurate detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is critical to prevent spread of the infection. Understanding of the antibody response to SARS-CoV-2 in patients with coronavirus disease 2019 (COVID-19) is insufficient, particularly in relation to those whose responses persist for more than 1 month after the onset of symptoms. We conducted a SARS-CoV-2 antibody test to identify factors affecting the serological response and to evaluate its diagnostic utility in patients with COVID-19.
Methods and finding
We collected 1,048 residual serum samples from 396 patients with COVID-19 confirmed by real-time reverse transcription polymerase chain reaction (RT-PCR) for SARS-CoV-2. The samples had been used for routine admission tests in six healthcare institutions in Daegu. Antibody to SARS-CoV-2 was analyzed and the cutoff index (COI) was calculated for quantitative analysis. The patients’ information was reviewed to evaluate the relationship between antibody positivity and clinical characteristics. The anti-SARS-CoV-2 antibody positivity rate was 85% and the average COI was 24·3. The positivity rate and COI increased with time elapsed since symptom onset. Anti-SARS-CoV-2 antibody persisted for at least 13 weeks after symptom onset at a high COI. There was a significant difference in anti-SARS-CoV-2 antibody positivity rate between patients with and without symptoms, but not according to sex or disease course. The descending COI pattern at weeks 1 to 5 after symptom onset was significantly more frequent in patients who died than in those who recovered.
Conclusions
Anti-SARS-CoV-2 antibody persisted for at least 13 weeks at a high COI in patients with COVID-19. A decreasing COI pattern up to fifth week may be associated with a poor prognosis of COVID-19. As new treatments and vaccines are introduced, it is important to monitor continuously the usefulness of anti-SARS-CoV-2 antibody assays.
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Affiliation(s)
- Sunggyun Park
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Soon Hee Chang
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Jae Hee Lee
- Department of Laboratory Medicine, Keimyung University Daegu-Dongsan Hospital, Daegu, Korea
| | - Jong Ho Lee
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Ji Yeon Ham
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Yu Kyung Kim
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Sang-Gyung Kim
- Department of Laboratory Medicine, Daegu Catholic University Hospital, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
- * E-mail:
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Kim YK, Minn D, Song DY, Lee CH, Ryoo NH, Jeon CH, Song KE, Suh JS, Chang SH. Prevalence of SARS-CoV-2 Antibody in 2,935 Healthcare Workers at 6 Major Hospitals, Daegu, Korea. J Korean Med Sci 2021; 36:e294. [PMID: 34751011 PMCID: PMC8575762 DOI: 10.3346/jkms.2021.36.e294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 10/14/2021] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND In Korea, the first community outbreak of coronavirus disease 2019 (COVID-19) occurred in Daegu on February 18, 2020. This study was performed to investigate the prevalence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) antibodies in healthcare workers (HCWs) at 6 major hospitals in Daegu. METHODS Blood specimens of 2,935 HCWs at 6 major hospitals in Daegu from January 2021 to February 2021 were collected. Every specimen was tested for antibody against SARS-CoV-2 using both Elecsys Anti-SARS-CoV-2 electrochemiluminescence immunoassay (Roche Diagnostics, Rotkreuz, Switzerland) and R-FIND COVID-19 IgG/M/A enzyme-linked immunosorbent assay kit (SG medical Inc., Seoul, Korea) as screening tests. If 1 or more of these screening test results was positive, 2 additional antibody tests were performed using Abbott Anti-SARS-CoV-2 IgG assay (Abbott, Abbott Park, IL, USA) and cPass SARS-CoV-2 Neutralization Antibody Detection Kit (GenScript USA Inc., Piscataway, NJ, USA). If 2 or more of the total 4 test results were positive, it was determined as positive for the antibody against SARS-CoV-2. RESULTS According to the criteria of SARS-CoV-2 antibody positivity determination, 12 subjects were determined as positive. The overall positive rate of the SARS-CoV-2 antibody was 0.41% (12/2,935). Of the 12 subjects determined as positive, 7 were diagnosed with COVID-19, and the remaining 5 were nondiagnosed cases of COVID-19. CONCLUSION In early 2021, the overall seroprevalence of SARS-CoV-2 antibody among HCW located in Daegu was 0.41%, and 0.17% excluding COVID-19 confirmed subjects. These results were not particularly high compared with the general public and were much lower than HCWs in other countries.
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Affiliation(s)
- Yu Kyung Kim
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Dohsik Minn
- Department of Diagnostic Immunology, Seegene Medical Foundation, Seoul, Korea
| | - Do Young Song
- Department of Laboratory Medicine, Daegu Fatima Hospital, Daegu, Korea
| | - Chae Hoon Lee
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Chang-Ho Jeon
- Department of Laboratory Medicine, Daegu Catholic University Hospital, Daegu, Korea
| | - Kyung Eun Song
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
- Department of Laboratory Medicine, Kyungpook National University Chilgok Hospital, Daegu, Korea
| | - Jang Soo Suh
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Soon Hee Chang
- Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea.
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Kim DH, Cho CH, Kwon SY, Ryoo NH, Jeon DS, Lee W, Ha JS. BRCA1/2 mutations, including large genomic rearrangements, among unselected ovarian cancer patients in Korea. J Gynecol Oncol 2019; 29:e90. [PMID: 30207098 PMCID: PMC6189434 DOI: 10.3802/jgo.2018.29.e90] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/19/2018] [Accepted: 07/18/2018] [Indexed: 12/18/2022] Open
Abstract
Objective We performed small-scale mutation and large genomic rearrangement (LGR) analysis of BRCA1/2 in ovarian cancer patients to determine the prevalence and the characteristics of the mutations. Methods All ovarian cancer patients who visited a single institution between September 2015 and April 2017 were included. Sanger sequencing, multiplex ligation-dependent probe amplification (MLPA), and long-range polymerase chain reaction (PCR) were performed to comprehensively study BRCA1/2. The genetic risk models BRCAPRO, Myriad, and BOADICEA were used to evaluate the mutation analysis. Results In total, 131 patients were enrolled. Of the 131 patients, Sanger sequencing identified 16 different BRCA1/2 small-scale mutations in 20 patients (15.3%). Two novel nonsense mutations were detected in 2 patients with a serous borderline tumor and a large-cell neuroendocrine carcinoma. MLPA analysis of BRCA1/2 in Sanger-negative patients revealed 2 LGRs. The LGRs accounted for 14.3% of all identified BRCA1 mutations, and the prevalence of LGRs identified in this study was 1.8% in 111 Sanger-negative patients. The genetic risk models showed statistically significant differences between mutation carriers and non-carriers. The 2 patients with LGRs had at least one blood relative with breast or ovarian cancer. Conclusion Twenty-two (16.8%) of the unselected ovarian cancer patients had BRCA1/2 mutations that were detected through comprehensive BRCA1/2 genetic testing. Ovarian cancer patients with Sanger-negative results should be considered for LGR detection if they have one blood relative with breast or ovarian cancer. The detection of more BRCA1/2 mutations in patients is important for efforts to provide targeted therapy to ovarian cancer patients.
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Affiliation(s)
- Do Hoon Kim
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Chi Heum Cho
- Department of Obstetrics and Gynecology, Keimyung University School of Medicine, Daegu, Korea
| | - Sun Young Kwon
- Department of Pathology, Keimyung University School of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Dong Seok Jeon
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Wonmok Lee
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jung Sook Ha
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea.
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11
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Kim SH, Park EH, Hwang IY, Lee H, Song SA, Lee M, Lee S, Kim SY, Kim JJ, Shin JH, Hong SG, Shin KS, Kim S, Ryoo NH, Lee W, Jang SJ, Shin JH. Serotyping and Antimicrobial Susceptibility of Salmonella Isolated in Korea in 2015. Ann Clin Microbiol 2019. [DOI: 10.5145/acm.2019.22.3.55] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Si Hyun Kim
- Department of Clinical Laboratory Science, Semyung University, Jecheon, Korea
| | - Eun Hee Park
- Department of Infectious Disease, Busan Institute of Health and Environment, Busan, Korea
| | - In Yeong Hwang
- Department of Infectious Disease, Busan Institute of Health and Environment, Busan, Korea
| | - Hyukmin Lee
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Sae Am Song
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Miae Lee
- Department of Laboratory Medicine, Ewha Womans University College of Medicine, Seoul, Korea
| | - Seungok Lee
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Soo Young Kim
- Department of Laboratory Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin Ju Kim
- Department of Laboratory Medicine, Inha University College of Medicine, Incheon, Korea
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Seong Geun Hong
- Department of Laboratory Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Kyeong Seob Shin
- Department of Laboratory Medicine, Chungbuk National University College of Medicine, Cheongju, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University College of Medicine, Daegu, Korea
| | - Woonhyoung Lee
- Department of Laboratory Medicine, Kosin University College of Medicine, Busan, Korea
| | - Sook Jin Jang
- Department of Laboratory Medicine, College of Medicine, Chosun University, Gwangju, Korea
| | - Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
- Paik Institute for Clinical Research, Inje University, Busan, Korea
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12
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Choi ES, Choi JH, Lee JM, Lee SM, Lee YJ, Kang YJ, Kim ES, Cho KB, Park KS, Jang BK, Hwang JS, Chung WJ, Ryoo NH, Jeon SW, Jung MK. Is the environment of the endoscopy unit a reservoir of pathogens? Intest Res 2014; 12:306-12. [PMID: 25374497 PMCID: PMC4214958 DOI: 10.5217/ir.2014.12.4.306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 04/11/2014] [Accepted: 04/14/2014] [Indexed: 12/03/2022] Open
Abstract
Background/Aims Given the characteristic procedures involved in the endoscopy unit, the spread of pathogens is much more frequent in this unit than in other environments. However, there is a lack of data elucidating the existence of pathogens in the endoscopy unit. The aim of this study was to detect the presence of possible pathogens in the endoscopy unit. Methods We performed environmental culture using samples from the endoscopy rooms of 2 tertiary hospitals. We used sterile cotton-tipped swabs moistened with sterile saline to swab the surfaces of 197 samples. Then, we cultured the swab in blood agar plate. Samples from the colonoscopy room were placed in thioglycollate broth to detect the presence of anaerobes. After 2 weeks of culture period, we counted the colony numbers. Results The most commonly contaminated spots were the doctor's keyboard, nurse's cart, and nurse's mouse. The common organisms found were non-pathogenic bacterial microorganisms Staphylococcus, Micrococcus, and Streptococcus spp.. No definite anaerobe organism was detected in the colonoscopy room. Conclusions Although the organisms detected in the endoscopy unit were mainly non-pathogenic organisms, they might cause opportunistic infections in immunocompromised patients. Therefore, the environment of the endoscopy room should be managed appropriately; moreover, individual hand hygiene is important for preventing possible hospital-acquired infections.
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Affiliation(s)
- Eun Sung Choi
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jae Hyuk Choi
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jung Min Lee
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Sang Min Lee
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Yoo Jin Lee
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Yu Jin Kang
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Eun Soo Kim
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Kwang Bum Cho
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Kyung Sik Park
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Byoung Kuk Jang
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jae Seok Hwang
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Woo Jin Chung
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Seong Woo Jeon
- Department of Internal Medicine, Kyungpook University School of Medicine, Daegu, Korea
| | - Min Kyu Jung
- Department of Internal Medicine, Kyungpook University School of Medicine, Daegu, Korea
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13
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Affiliation(s)
- Jong Hwa Jun
- Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Eui Chong Kim
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sung Dong Chang
- Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea
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14
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Affiliation(s)
- Jong Hwa Jun
- Department of Ophthalmology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
| | - Sung Dong Chang
- Department of Ophthalmology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
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Shin JH, Kim EC, Kim S, Koh EH, Lee DH, Koo SH, Cho JH, Kim JS, Ryoo NH. A Multicentre Study about Pattern and Organisms Isolated in Follow-up Blood Cultures. Ann Clin Microbiol 2013. [DOI: 10.5145/acm.2013.16.1.8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Eui Chong Kim
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Eun-Ha Koh
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Dong-Hyun Lee
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Sun-Hoi Koo
- Department of Laboratory Medicine, Chungnam National University College of Medicine, Daejeon, Korea
| | - Ji-Hyun Cho
- Department of Laboratory Medicine, Wonkwang University Medical School, Iksan, Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
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Abstract
Phialemonium keratitis is a very rare case and we encountered a case of keratitis caused by Phialemonium obovatum (P. obovatum) after penetrating injury to the cornea. This is the first case report in the existing literature. A 54-year-old male was referred to us after a penetration injury, and prompt primary closure was performed. Two weeks after surgery, an epithelial defect and stromal melting were observed near the laceration site. P. obovatum was identified, and then identified again on repeated cultures. Subsequently, Natacin was administered every two hours. Amniotic membrane transplantation was performed due to a persistent epithelial defect and impending corneal perforation. Three weeks after amniotic membrane transplantation, the epithelial defect had completely healed, but the cornea had turned opaque. Six months after amniotic membrane transplantation, visual acuity was light perception only, and corneal thinning and diffuse corneal opacification remained opaque. Six months after amniotic membrane transplantation, visual acuity was light perception only, and corneal thinning and diffuse corneal opacification remained.
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Affiliation(s)
- Kwon Ho Hong
- Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea
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17
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Jeong HS, Bae IK, Shin JH, Kim SH, Chang CL, Jeong J, Kim S, Lee CH, Ryoo NH, Lee JN. Fecal Colonization ofEnterobacteriaceaeCarrying Plasmid-Mediated Quinolone Resistance Determinants in Korea. Microb Drug Resist 2011; 17:507-12. [DOI: 10.1089/mdr.2011.0040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Haeng Soon Jeong
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Il Kwon Bae
- Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea
| | - Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
- Paik Institute for Clinical Research, Inje University College of Medicine, Busan, Korea
| | - Si Hyun Kim
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
| | - Chulhun L. Chang
- Department of Laboratory Medicine, Pusan National University School of Medicine, Yangsan, Korea
| | - Joseph Jeong
- Department of Laboratory Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Chae Hoon Lee
- Department of Laboratory Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Jeong Nyeo Lee
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
- Paik Institute for Clinical Research, Inje University College of Medicine, Busan, Korea
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18
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Shin JH, Song SA, Kim MN, Lee NY, Kim EC, Kim S, Koo SH, Ryoo NH, Kim JS, Cho JH. Comprehensive analysis of blood culture performed at nine university hospitals in Korea. Korean J Lab Med 2011; 31:101-6. [PMID: 21474985 PMCID: PMC3115996 DOI: 10.3343/kjlm.2011.31.2.101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background Optimal blood culture performance is critical for successful diagnosis and treatment of sepsis. To understand the status of blood culture, we investigated several aspects of the procedure at 9 university hospitals. Methods The process of ordering blood culture sets and sampling volume for adults and children was investigated from January 2010 to April 2010, while the positive rate of detection and growth of skin contaminants were compared in 2009. Microbial growth in aerobic and anaerobic bottles was investigated prospectively. Results A majority of the hospitals used 2 sets of bottles for adults and 1 bottle for children. The average blood volume in each set was 7.7 mL for adults and 2.1 mL for children. The positive rate of microorganisms was 8.0%, and the isolation rate of the normal flora of the skin was 2.1%. Bacterial growth rates in aerobic and anaerobic bottles only were 31.8% and 24.5% respectively. Conclusions Ordering blood culture sets and sampling volumes did not comply with CLSI guidelines. However, the rate of positive cultures and skin contamination rates were acceptable. Anaerobic bottles are useful in enhancing the yield of microorganisms.
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Affiliation(s)
- Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
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Kim HJ, Lee NY, Kim S, Shin JH, Kim MN, Kim EC, Koo SH, Ryoo NH, Kim JS, Cho JH. Characteristics of Microorganisms Isolated from Blood Cultures at Nine University Hospitals in Korea during 2009. ACTA ACUST UNITED AC 2011. [DOI: 10.5145/kjcm.2011.14.2.48] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hee-Jung Kim
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Nam Yong Lee
- Department of Laboratory Medicine & Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sunjoo Kim
- Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
- Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jeong Hwan Shin
- Department of Laboratory Medicine, Inje University College of Medicine, Busan, Korea
- Paik Institute for Clinical Research, Inje University College of Medicine, Busan, Korea
| | - Mi-Na Kim
- Department of Laboratory Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Korea
| | - Eui-Chong Kim
- Department of Laboratory Medicine, Seoul National University Hospital, Seoul, Korea
| | - Sun Hoi Koo
- Department of Laboratory Medicine, College of Medicine, Chungnam National University, Daejeon, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, Korea
| | - Ji-Hyun Cho
- Department of Laboratory Medicine, College of Medicine, Wonkwang University, Iksan, Korea
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20
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Choi GE, Jang MH, Song EJ, Jeong SH, Kim JS, Lee WG, Uh Y, Roh KH, Lee HS, Shin JH, Ryoo NH, Kim YR, Jeong J, Kim JH, Lee SM, Yi J, Hwang SH, Kim HH, Lee EY, Chang CL, Kim MB, Kim YD. IS6110-restriction fragment length polymorphism and spoligotyping analysis of Mycobacterium tuberculosis clinical isolates for investigating epidemiologic distribution in Korea. J Korean Med Sci 2010; 25:1716-21. [PMID: 21165284 PMCID: PMC2995223 DOI: 10.3346/jkms.2010.25.12.1716] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 07/22/2010] [Indexed: 12/05/2022] Open
Abstract
The Beijing family of Mycobacterium tuberculosis has been emerging in the world. However, there are few nationwide data of genotypic distribution in Korea. This study aimed to identify the genotypic diversity of clinical isolates of M. tuberculosis and to demonstrate the population of Beijing family in Korea. We collected 96 clinical M. tuberculosis isolates from 11 university hospitals nationwide in Korea from 2008 to 2009. We observed 24 clusters in IS6110-RFLP analysis and 19 patterns in spoligotyping. Seventy-five isolates were confirmed to be Beijing family. Two isolates of the K strain and 12 isolates of the K family strain were also found. We found that drug resistance phenotypes were more strongly associated with Beijing family than non-Beijing family (P=0.003). This study gives an overview of the distribution of genotypes of M. tuberculosis in Korea. These findings indicate that we have to pay more attention to control of M. tuberculosis strains associated with the Beijing family.
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Affiliation(s)
- Go Eun Choi
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Mi Hee Jang
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Eun Ju Song
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Seok Hoon Jeong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, Korea
| | - Wee Gyo Lee
- Department of Laboratory Medicine, Ajou University School of Medicine, Suwon, Korea
| | - Young Uh
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Kyoung Ho Roh
- Department of Laboratory Medicine, Korea University College of Medicine, Seoul, Korea
| | - Hye Soo Lee
- Department of Laboratory Medicine, Chonbuk National University Medical School, Jeonju, Korea
| | - Jong Hee Shin
- Department of Laboratory Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Young Ree Kim
- Department of Laboratory Medicine, Cheju National University College of Medicine, Jeju, Korea
| | - Joseph Jeong
- Department of Laboratory Medicine, Ulsan University Hospital & Ulsan University College of Medicine, Ulsan, Korea
| | - Jee Hee Kim
- Department of Emergency Medical Technology, Kangwon National University, Samcheok, Korea
| | - Sun Min Lee
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Jongyoun Yi
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Sang Hyun Hwang
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Hyung Hoi Kim
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Eun Yup Lee
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Chulhun L. Chang
- Department of Laboratory Medicine, School of Medicine, Pusan National University, Busan, Korea
| | - Moon-Bum Kim
- Department of Dermatology, School of Medicine, Pusan National University, Busan, Korea
| | - Yeong Dae Kim
- Department of Thoracic and Cardiovascular Surgery, School of Medicine, Pusan National University, Busan, Korea
- Medical Research Institute, Pusan National University, Busan, Korea
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21
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Ryoo NH, Ha JS, Jeon DS, Kim JR. Prevalence of Metallo-β-lactamases in Imipenem-non-susceptiblePseudomonas aeruginosaandAcinetobacter baumannii. ACTA ACUST UNITED AC 2010. [DOI: 10.5145/kjcm.2010.13.4.169] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nam Hee Ryoo
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Jung Sook Ha
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Dong Seok Jeon
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Jae Ryong Kim
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
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Lee KK, Ryoo NH, Kim ST, Chae SL, Huh HJ. [Evaluation of the BD phoenix automated microbiology system SMIC/ID-2 panel for antimicrobial susceptibility testing of Streptococcus pneumoniae]. Korean J Lab Med 2009; 29:212-7. [PMID: 19571618 DOI: 10.3343/kjlm.2009.29.3.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND With the emergence of antimicrobial resistance among Streptococcus pneumoniae, a more accurate and automated antimicrobial susceptibility testing method is essential. We evaluated the BD Phoenix Automated Microbiology System (Becton Dickinson Diagnostic Systems, USA) SMIC/ID-2 panel for antimicrobial susceptibility testing of S. pneumoniae. METHODS A total of 113 clinical strains of S. pneumoniae (88 penicillin susceptible strains, 8 intermediate strains, and 17 resistant strains by 2008 CLSI criteria) were tested. Minimum inhibitory concentrations (MICs) for penicillin, cefotaxime, clindamycin, erythromycin, levofloxacin, trimethoprim/ sulfamethoxazole, tetracycline, and vancomycin were determined by Etest (AB Biodisk, Sweden) and Phoenix System. The results obtained by Phoenix system were compared to those obtained by Etest. RESULTS The overall essential agreement of MICs (within one dilution of MICs) defined by the Phoenix and Etest was 92.3%. Neither very major errors nor major errors were produced, and minor errors were 6.5%. Minor errors were frequently observed in susceptibility testings for penicillin (22.1%), cefotaxime (12.4%), and trimethoprim/sulfamethoxazole (11.5%). CONCLUSIONS The Phoenix SMIC/ID-2 panel provided a simple and rapid susceptibility testing for S. pneumoniae, and the results were in a good agreement with those of Etest. The Phoenix system appears to be an effective automated system in clinical microbiology laboratories.
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Affiliation(s)
- Kyo Kwan Lee
- Department of Laboratory Medicine, Dongguk University International Hospital, Ilsandong-Gu, Goyang, Korea
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Ryoo NH, Ha JS, Jeon DS, Kim JR, Hwang EA. Alternaria peritonitis after contact with a cat. Perit Dial Int 2009; 29:235-236. [PMID: 19293364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
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Ryoo NH, Lee K, Lim JB, Lee YH, Bae IK, Jeong SH. Outbreak by meropenem-resistant Pseudomonas aeruginosa producing IMP-6 metallo-β-lactamase in a Korean hospital. Diagn Microbiol Infect Dis 2009; 63:115-7. [DOI: 10.1016/j.diagmicrobio.2008.08.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 08/06/2008] [Accepted: 08/20/2008] [Indexed: 12/01/2022]
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Affiliation(s)
- Kyung Ji Kang
- Department of Pediatrics, Keimyung University School of Medicine, Daegu, Korea
| | - Hye Jung Yun
- Department of Pediatrics, Keimyung University School of Medicine, Daegu, Korea
| | - Seong Yeol Ryu
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Diagnostic Laboratory, Keimyung University School of Medicine, Daegu, Korea
| | - Yu Na Kang
- Department of Pathology, Keimyung University School of Medicine, Daegu, Korea
| | - Jin Bok Hwang
- Department of Pediatrics, Keimyung University School of Medicine, Daegu, Korea
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26
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Ha JS, Lee WM, Kim JH, Ryoo NH, Jeon DS, Kim JR, Kim HS, Choi BK. GATA1Mutation in Transient Myeloproliferative Disorder of Down Syndrome. Korean J Hematol 2008. [DOI: 10.5045/kjh.2008.43.1.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Jung Sook Ha
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Won Mok Lee
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Ji Hye Kim
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Dong Suk Jeon
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Jae Ryong Kim
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Deagu, Korea
| | - Heung Sik Kim
- Department of Pediatrics, School of Medicine, Keimyung University, Deagu, Korea
| | - Byung Kyu Choi
- Department of Pediatrics, School of Medicine, Keimyung University, Deagu, Korea
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Lee WM, Kim JH, Ha JS, Ryoo NH, Jeon DS, Kim JR, Cho D. [A RhD negative patient failed to produce detectable anti-D after transfusion of 35 units of RhD positive red blood cells]. Korean J Lab Med 2007; 27:369-72. [PMID: 18094603 DOI: 10.3343/kjlm.2007.27.5.369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In the present day, pretransfusion tests include ABO and RhD grouping, antibody screening, antibody identification, and cross matching. Although error rates for these tests have decreased compared to those in the past, clerical errors still occur. When exposed to RhD positive RBCs, a RhD negative person can produce anti-D that causes a severe hemolytic disease of the fetus and the newborn in addition to hemolytic transfusion reactions. Therefore, administration of RhD positive RBCs to a RhD negative person should be avoided. We experienced a RhD negative patient who had been misidentified as positive and transfused 35 units of RhD positive RBCs eight years ago, but did not have detectable anti-D in present. The red cells of the patient showed no agglutination with the anti-D reagent and a negative result in the standard weak D test. The multiplex PCR with sequence-specific priming revealed that the patient was RhD negative.
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Affiliation(s)
- Won Mok Lee
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea.
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Abstract
Interleukin (IL)-12 activates T helper (Th) 1 cells to produce interferon (IFN)-gamma which inhibits atopic inflammation. IL-12 acts through interaction with its receptor, especially beta(2) subunit. In several studies, the low production of IFN-gamma in peripheral mononuclear cells of atopic patients on response to IL-12 stimulation has been reported. Therefore we investigated the IL-12 receptor beta(2) (IL-12R beta(2)) mRNA expression and RNA editing, nucleotide 2451 C-to-U conversion, to find the cause of low responsiveness to IL-12 in atopy. Quantitative real time PCR for mRNA expression and sequence analysis for RNA editing were performed in 80 atopic patients and 54 healthy controls. The expression of IL-12R beta(2) mRNA was significantly lower in atopic patients than healthy controls (p<0.05). In sequence analysis, RNA editing on nucleotide 2451 was not found from either atopic patients or healthy controls. In additional evaluation, there was no relationship between expression of IL-12R beta(2) mRNA and serum total IgE or blood eosinophil count. Reduced IL-12R beta(2) mRNA expression in atopic patients indicate the reduced capacity to respond to IL-12 which induce IFN-gamma production and this may contribute to Th2-skewed immune response in atopy.
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Affiliation(s)
- Eun Jin Kim
- Daegu Kyoungbook Blood Center, Korea Red Cross, Daegu, Korea
| | - Won Mok Lee
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Jung Sook Ha
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Nam Hee Ryoo
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Dong Suk Jeon
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
| | - Jae Ryong Kim
- Department of Laboratory Medicine, School of Medicine, Keimyung University, Daegu, Korea
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Ryoo NH, Kim EC, Hong SG, Park YJ, Lee K, Bae IK, Song EH, Jeong SH. Dissemination of SHV-12 and CTX-M-type extended-spectrum beta-lactamases among clinical isolates of Escherichia coli and Klebsiella pneumoniae and emergence of GES-3 in Korea. J Antimicrob Chemother 2005; 56:698-702. [PMID: 16141280 DOI: 10.1093/jac/dki324] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES To assess the prevalence and genotypes of Ambler class A extended-spectrum beta-lactamases (ESBLs) in Korea. METHODS Clinical isolates of Escherichia coli and Klebsiella pneumoniae collected from 12 Korean hospitals during February-July 2003 were evaluated. Antimicrobial susceptibilities were determined by disc diffusion and agar dilution methods, and the putative ESBL-producing strains were tested by the double-disc synergy method. Detection of genes encoding class A beta-lactamases was performed by PCR amplification, and the PCR products were subjected to direct sequencing. RESULTS The double-disc synergy test showed positive results in 9.3% (23/246) of E. coli and 23.0% (55/239) of K. pneumoniae isolates. The most prevalent types of Ambler class A ESBLs in E. coli isolates were CTX-M-15 (n = 4) and CTX-M-3 (n = 3), and those in K. pneumoniae isolates were SHV-12 (n = 30) and CTX-M-3 (n = 13). Two isolates produced both SHV-12 and GES-3, simultaneously. CONCLUSIONS CTX-M-type and/or SHV-12 ESBL-producing E. coli and K. pneumoniae isolates are spreading, and a GES-type ESBL has emerged in Korea.
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Affiliation(s)
- Nam Hee Ryoo
- Department of Laboratory Medicine, Keimyung University College of Medicine, Daegu
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Ryoo NH, Chun HJ, Jeon DS, Kim JR, Park SB. Bacillus licheniformis peritonitis in a CAPD patient. Perit Dial Int 2001; 21:97. [PMID: 11280510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
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