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Xia S, Wang W, Cheng J, Zhang T, Xia Z, Zhao X, Han Y, Li Y, Shi X, Qin S. Emergence of a novel hybrid mcr-1-bearing plasmid in an NDM-7-producing ST167 Escherichia coli strain of clinical origin. Front Microbiol 2022; 13:950087. [PMID: 36090088 PMCID: PMC9449459 DOI: 10.3389/fmicb.2022.950087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Colistin is considered as an antibiotic of ‘last resort’ for the treatment of lethal infections caused by carbapenem-resistant Enterobacterales (CRE), dissemination of plasmid-borne colistin resistance gene mcr-1, particularly into CRE, resulting in the emergence of strains that approach pan-resistance. A wide variety of plasmid types have been reported for carrying mcr-1. Among which, large IncHI2-type plasmids were multidrug-resistant (MDR) plasmids harbored multiple resistance determinants in addition to mcr-1. Herein, we characterized a novel hybrid IncHI2-like mcr-1-bearing plasmid in an NDM-7-producing ST167 Escherichia coli strain EC15-50 of clinical origin. Antimicrobial susceptibility testing showed E. coli EC15-50 exhibited an extensively drug-resistant (XDR) profile that only susceptible to amikacin and tigecycline. S1-PFGE, Southern hybridization and Whole-genome Sequencing (WGS) analysis identified a 46,161 bp blaNDM-7-harboring IncX3 plasmid pEC50-NDM7 and a 350,179 bp mcr-1-bearing IncHI2/HI2A/N/FII/FIA plasmid pEC15-MCR-50 in E. coli EC15-50. Sequence detail analysis revealed the type IV coupling protein (T4CP) gene was absent on pEC15-MCR-50, explaining that pEC15-MCR-50 was a non-conjugative plasmid. Comparative genetic analysis indicated the hybrid plasmid pEC15-MCR-50 was probably originated from pXGE1mcr-like IncHI2/HI2A/N plasmid and pSJ_94-like IncFII/FIA plasmid, and generated as a result of a replicative transposition process mediated by IS26. Currently, the prevalent mcr-1-carrying IncHI2 plasmids were rarely reported to be fused with other plasmids. The identification of the novel hybrid plasmid pEC15-MCR-50 in this study highlighted the importance of close surveillance for the emergence and dissemination of such fusion MDR plasmids, particularly in NDM-producing Enterobacterales.
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Affiliation(s)
- Shuang Xia
- Department of Medical Laboratory, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Wei Wang
- Department of Medical Laboratory, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Jing Cheng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Tingting Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Ziwei Xia
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Xiaoyu Zhao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Yungang Han
- Department of Medical Laboratory, Henan Provincial Chest Hospital, Zhengzhou, China
| | - Yonghong Li
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
- *Correspondence: Yonghong Li,
| | - Xiufang Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
- Xiufang Shi,
| | - Shangshang Qin
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, China
- Shangshang Qin,
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Wu PC, Cheng MF, Chen WL, Hung WY, Wang JL, Hung CH. Risk Factors and Prevalence of mcr-1-Positive Escherichia coli in Fecal Carriages Among Community Children in Southern Taiwan. Front Microbiol 2021; 12:748525. [PMID: 34867866 PMCID: PMC8640213 DOI: 10.3389/fmicb.2021.748525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/25/2021] [Indexed: 12/24/2022] Open
Abstract
Colistin is the last resort antimicrobial for treating multidrug-resistant gram-negative bacterial infections. The plasmid-mediated colistin resistance gene, mcr-1, crucially influences colistin’s resistance transmission. Human fecal carriages of mcr-1-positive Escherichia coli (E. coli) were detected in many regions worldwide; however, only a few studies have focused on children. Therefore, we identified the prevalence and risk factors of mcr-1-positive E. coli in fecal carriages among community children in Southern Taiwan. In this study, 510 stool samples were collected from April 2016 to August 2019 from the pediatric department at a medical center in Southern Taiwan. These samples were collected within 3 days after admission and were all screened for the presence of the mcr-1 gene. Diet habits, travel history, pet contact, and medical history were also obtained from participants to analyze the risk factors of their fecal carriages to mcr-1-positive E. coli. Antimicrobial susceptibility testing was determined using the VITEK 2 system and the broth microdilution test. Twelve mcr-1-positive E. coli. were isolated from 2.4% of the fecal samples. Through multivariate analysis, frequent chicken consumption (at least 3 times per week) had a significantly positive association with the presence of mcr-1-positive E. coli in fecal carriages (adjust odds ratio 6.60, 95% confidence interval1.58– 27.62, p = 0.033). Additionally, multidrug resistance was more common in mcr-1-positive E. coli. (75.0% vs. 39.5%, p = 0.031) than in non-mcr-1-positive Escherichia coli. Furthermore, the percentage of extraintestinal pathogenic E. coli in mcr-1-positive isolates was 83.3%. Some multi-locus sequence types in our mcr-1-positive E. coli were also similar to those isolated from food animals in the literature. The prevalence of fecal carriages of mcr-1-positive E. coli was low among community children in Southern Taiwan. Our data shows that chicken consumption with a higher frequency increases the risk of mcr-1-positive E. coli. in fecal carriages.
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Affiliation(s)
- Pin-Chieh Wu
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan.,Department of Physical Examination Center, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,Department of Nursing, Meiho University, Pingtung, Taiwan
| | - Ming-Fang Cheng
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan.,Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan.,Department of Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Nursing, Fooyin University, Kaohsiung, Taiwan
| | - Wan-Ling Chen
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan.,Department of Nursing, Meiho University, Pingtung, Taiwan
| | - Wan-Yu Hung
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Jiun-Ling Wang
- Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,Department of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Hsin Hung
- Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan
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