Thi Anh Mai Pham, Tung Xuan Nguyen, Troung Nhat My, Lan Thi Le, Huyen Thi Vu, Ngoc Thi Bich Hoang, Dien M Tran, Linh Viet Nguyen, Phuc D Pham, Dennis Nurjadi, Flavie Goutard, Thirumalaisamy P Velavan, Van Anh Thi Dinh, Y M Gildas Hounmanou, Bent Jörgensen, Le Huu Song, Nhung T T Nguyen, Etienne Loire, Åse Östholm, Lennart E Nilsson, Tuyet Hanh T Tran, Phuc H Phan, Anders Dalsgaard, Mattias Larsson, Linus Olson, Håkan Hanberger
{"title":"评估在资源有限的环境中检测产碳青霉烯酶肠杆菌直肠定植的筛查算法。","authors":"Thi Anh Mai Pham, Tung Xuan Nguyen, Troung Nhat My, Lan Thi Le, Huyen Thi Vu, Ngoc Thi Bich Hoang, Dien M Tran, Linh Viet Nguyen, Phuc D Pham, Dennis Nurjadi, Flavie Goutard, Thirumalaisamy P Velavan, Van Anh Thi Dinh, Y M Gildas Hounmanou, Bent Jörgensen, Le Huu Song, Nhung T T Nguyen, Etienne Loire, Åse Östholm, Lennart E Nilsson, Tuyet Hanh T Tran, Phuc H Phan, Anders Dalsgaard, Mattias Larsson, Linus Olson, Håkan Hanberger","doi":"10.1093/jacamr/dlae089","DOIUrl":null,"url":null,"abstract":"<p><strong>Objectives: </strong>To improve and rationalize the detection of carbapenemase-producing Enterobacterales (CPE) in rectal swabs in a high-prevalence and resource-constrained setting, addressing surveillance challenges typically encountered in laboratories with limited resources.</p><p><strong>Methods: </strong>A point prevalence survey (PPS) was conducted on 15 August 2022, in a provincial children's hospital in northern Vietnam. Rectal swab samples of all admitted children were collected and plated on a selective medium for carbapenem-resistant Enterobacterales (CRE). Species identification and antimicrobial susceptibility testing (AST) were performed by MALDI-TOF, and VITEK2 XL and interpreted according to CLSI breakpoints (2022). Carbapenemases were detected by the carbapenem inactivation method (CIM) and quantitative real-time PCR (qRT-PCR).</p><p><strong>Results: </strong>Rectal swab samples were obtained from 376 patients. Of 178 isolates growing on the CRE screening agar, 140 isolates were confirmed as Enterobacterales of which 118 (84.3%) isolates were resistant to meropenem and/or ertapenem. CIM and PCR showed that 90/118 (76.3%) were carbapenemase producers. Overall, 83/367 (22.6%) were colonized by CPE. <i>Klebsiella pneumoniae</i>, <i>Escherichia coli</i> and <i>Enterobacter cloacae</i> complex were the most common CPE detected, with NDM as the predominant carbapenemase (78/90; 86.7%). Phenotypic resistance to meropenem was the best predictor of CPE production (sensitivity 85.6%, specificity 100%) compared with ertapenem resistance (95.6% sensitivity, 36% specificity). CIM was 100% concordant with PCR in detecting carbapenemases.</p><p><strong>Conclusions: </strong>These findings underscore the effectiveness of meropenem resistance as a robust indicator of the production of carbapenemases and the reliability of the CIM method to detect such carbapenemases in resource-limited settings where the performance of molecular methods is not possible.</p>","PeriodicalId":14594,"journal":{"name":"JAC-Antimicrobial Resistance","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11166082/pdf/","citationCount":"0","resultStr":"{\"title\":\"Evaluation of screening algorithms to detect rectal colonization with carbapenemase-producing Enterobacterales in a resource-limited setting.\",\"authors\":\"Thi Anh Mai Pham, Tung Xuan Nguyen, Troung Nhat My, Lan Thi Le, Huyen Thi Vu, Ngoc Thi Bich Hoang, Dien M Tran, Linh Viet Nguyen, Phuc D Pham, Dennis Nurjadi, Flavie Goutard, Thirumalaisamy P Velavan, Van Anh Thi Dinh, Y M Gildas Hounmanou, Bent Jörgensen, Le Huu Song, Nhung T T Nguyen, Etienne Loire, Åse Östholm, Lennart E Nilsson, Tuyet Hanh T Tran, Phuc H Phan, Anders Dalsgaard, Mattias Larsson, Linus Olson, Håkan Hanberger\",\"doi\":\"10.1093/jacamr/dlae089\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objectives: </strong>To improve and rationalize the detection of carbapenemase-producing Enterobacterales (CPE) in rectal swabs in a high-prevalence and resource-constrained setting, addressing surveillance challenges typically encountered in laboratories with limited resources.</p><p><strong>Methods: </strong>A point prevalence survey (PPS) was conducted on 15 August 2022, in a provincial children's hospital in northern Vietnam. Rectal swab samples of all admitted children were collected and plated on a selective medium for carbapenem-resistant Enterobacterales (CRE). Species identification and antimicrobial susceptibility testing (AST) were performed by MALDI-TOF, and VITEK2 XL and interpreted according to CLSI breakpoints (2022). Carbapenemases were detected by the carbapenem inactivation method (CIM) and quantitative real-time PCR (qRT-PCR).</p><p><strong>Results: </strong>Rectal swab samples were obtained from 376 patients. Of 178 isolates growing on the CRE screening agar, 140 isolates were confirmed as Enterobacterales of which 118 (84.3%) isolates were resistant to meropenem and/or ertapenem. CIM and PCR showed that 90/118 (76.3%) were carbapenemase producers. Overall, 83/367 (22.6%) were colonized by CPE. <i>Klebsiella pneumoniae</i>, <i>Escherichia coli</i> and <i>Enterobacter cloacae</i> complex were the most common CPE detected, with NDM as the predominant carbapenemase (78/90; 86.7%). Phenotypic resistance to meropenem was the best predictor of CPE production (sensitivity 85.6%, specificity 100%) compared with ertapenem resistance (95.6% sensitivity, 36% specificity). CIM was 100% concordant with PCR in detecting carbapenemases.</p><p><strong>Conclusions: </strong>These findings underscore the effectiveness of meropenem resistance as a robust indicator of the production of carbapenemases and the reliability of the CIM method to detect such carbapenemases in resource-limited settings where the performance of molecular methods is not possible.</p>\",\"PeriodicalId\":14594,\"journal\":{\"name\":\"JAC-Antimicrobial Resistance\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-06-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11166082/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"JAC-Antimicrobial Resistance\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1093/jacamr/dlae089\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/6/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q2\",\"JCRName\":\"INFECTIOUS DISEASES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"JAC-Antimicrobial Resistance","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1093/jacamr/dlae089","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/6/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"INFECTIOUS DISEASES","Score":null,"Total":0}
Evaluation of screening algorithms to detect rectal colonization with carbapenemase-producing Enterobacterales in a resource-limited setting.
Objectives: To improve and rationalize the detection of carbapenemase-producing Enterobacterales (CPE) in rectal swabs in a high-prevalence and resource-constrained setting, addressing surveillance challenges typically encountered in laboratories with limited resources.
Methods: A point prevalence survey (PPS) was conducted on 15 August 2022, in a provincial children's hospital in northern Vietnam. Rectal swab samples of all admitted children were collected and plated on a selective medium for carbapenem-resistant Enterobacterales (CRE). Species identification and antimicrobial susceptibility testing (AST) were performed by MALDI-TOF, and VITEK2 XL and interpreted according to CLSI breakpoints (2022). Carbapenemases were detected by the carbapenem inactivation method (CIM) and quantitative real-time PCR (qRT-PCR).
Results: Rectal swab samples were obtained from 376 patients. Of 178 isolates growing on the CRE screening agar, 140 isolates were confirmed as Enterobacterales of which 118 (84.3%) isolates were resistant to meropenem and/or ertapenem. CIM and PCR showed that 90/118 (76.3%) were carbapenemase producers. Overall, 83/367 (22.6%) were colonized by CPE. Klebsiella pneumoniae, Escherichia coli and Enterobacter cloacae complex were the most common CPE detected, with NDM as the predominant carbapenemase (78/90; 86.7%). Phenotypic resistance to meropenem was the best predictor of CPE production (sensitivity 85.6%, specificity 100%) compared with ertapenem resistance (95.6% sensitivity, 36% specificity). CIM was 100% concordant with PCR in detecting carbapenemases.
Conclusions: These findings underscore the effectiveness of meropenem resistance as a robust indicator of the production of carbapenemases and the reliability of the CIM method to detect such carbapenemases in resource-limited settings where the performance of molecular methods is not possible.