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Yin L, Lu L, He L, Wang L, Lu G, Cao Y, Zhai X, Wang C. Shift in the dominant sequence type of carbapenem-resistant Klebsiella pneumonia infection from ST278-NDM-1 to ST11-KPC-2 in neonatal patients in a children's hospital in Shanghai, China, 2017-2021. Int Microbiol 2024; 27:871-881. [PMID: 37857932 DOI: 10.1007/s10123-023-00436-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 10/08/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
OBJECTIVES To investigate the clinical characteristics and molecular epidemiology of CRKP infection in neonatal patients in a children's hospital in China from 2017 to 2021. METHODS Species identification and antibiotic susceptibilities were tested with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and VITEK 2 systems. The clinical data were collected from medical records. Carbapenem-resistant Klebsiella pneumoniae (CRKP) isolates were investigated by antimicrobial susceptibility testing, carbapenemase genes and multilocus sequence typing. RESULTS Six kinds of resistant genes and 23 STs were detected. BlaNDM-1 (n=83, 55.3%) was the predominant carbapenemase gene, followed by blaKPC-2 (n=45, 30.0%), blaNDM-5 (n=7, 4.7%), blaIMP-38 (n=6, 4.0%). BlaNDM-1 was predominant in 2017 and 2018, whereas blaKPC-2 increased in 2019 and became the predominant gene from 2020 to 2021. ST11 accounted for most infections (n=35, 23.3%), followed by ST278 (n=23, 15.3%), ST17 (n=17, 11. 3%) and ST2735 (n=16, 10.7%). ST278 and ST17 were predominant in 2017 and 2018, whereas ST11 increased in 2019 and became the predominant sequence type from 2020 to 2021. Compared with blaNDM-1, the CRKP strains producing blaKPC-2 were characterized by high resistance to gentamicin, amikacin and levofloxacin and the change trend of drug resistance rate before and after COVID-19 was consistent with that of blaNDM-1 and blaKPC-2. CONCLUSIONS The main sequence type of CRKP infection changed dynamically from ST278-NDM-1 to ST11-KPC-2 during the years 2017-2021 in the newborns. Antibiotic exposure and the prevalence of COVID-19 since 2020 may have led to changes in hospital population and lead to the changes.
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Affiliation(s)
- Lijun Yin
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Lu Lu
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Leiyan He
- The Clinical Microbiology Laboratory, Children's Hospital of Fudan University, Shanghai, China
| | - Laishuan Wang
- Department of Neonatal Room, Children's Hospital of Fudan University, Shanghai, China
| | - Guoping Lu
- Department of Pediatric Intensive Care Unit, Children's Hospital of Fudan University, Shanghai, China
| | - Yun Cao
- Department of Neonatal Intensive Care Unit, Children's Hospital of Fudan University, Shanghai, China.
| | - Xiaowen Zhai
- Department of Hematology, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 200032, Shanghai, China.
| | - Chuanqing Wang
- Department of Nosocomial Infection Control and the Clinical Microbiology Laboratory, Children's Hospital of Fudan University, Shanghai, China.
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Wang Q, Liu Y, Chen R, Zhang M, Si Z, Wang Y, Jin Y, Bai Y, Song Z, Lu X, Hao M, Hao Y. Genomic insights into the evolution and mechanisms of carbapenem-resistant hypervirulent Klebsiella pneumoniae co-harboring bla KPC and bla NDM: implications for public health threat mitigation. Ann Clin Microbiol Antimicrob 2024; 23:27. [PMID: 38553771 PMCID: PMC10981300 DOI: 10.1186/s12941-024-00686-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 03/21/2024] [Indexed: 04/01/2024] Open
Abstract
BACKGROUND Carbapenem-resistant hypervirulent Klebsiella pneumoniae (CR-hvKP) co-producing blaKPC and blaNDM poses a serious threat to public health. This study aimed to investigate the mechanisms underlying the resistance and virulence of CR-hvKP isolates collected from a Chinese hospital, with a focus on blaKPC and blaNDM dual-positive hvKP strains. METHODS Five CR-hvKP strains were isolated from a teaching hospital in China. Antimicrobial susceptibility and plasmid stability testing, plasmid conjugation, pulsed-field gel electrophoresis, and whole-genome sequencing (WGS) were performed to examine the mechanisms of resistance and virulence. The virulence of CR-hvKP was evaluated through serum-killing assay and Galleria mellonella lethality experiments. Phylogenetic analysis based on 16 highly homologous carbapenem-resistant K. pneumoniae (CRKP) producing KPC-2 isolates from the same hospital was conducted to elucidate the potential evolutionary pathway of CRKP co-producing NDM and KPC. RESULTS WGS revealed that five isolates individually carried three unique plasmids: an IncFIB/IncHI1B-type virulence plasmid, IncFII/IncR-type plasmid harboring KPC-2 and IncC-type plasmid harboring NDM-1. The conjugation test results indicated that the transference of KPC-2 harboring IncFII/IncR-type plasmid was unsuccessful on their own, but could be transferred by forming a hybrid plasmid with the IncC plasmid harboring NDM. Further genetic analysis confirmed that the pJNKPN26-KPC plasmid was entirely integrated into the IncC-type plasmid via the copy-in route, which was mediated by TnAs1 and IS26. CONCLUSION KPC-NDM-CR-hvKP likely evolved from a KPC-2-CRKP ancestor and later acquired a highly transferable blaNDM-1 plasmid. ST11-KL64 CRKP exhibited enhanced plasticity. The identification of KPC-2-NDM-1-CR-hvKP highlights the urgent need for effective preventive strategies against aggravated accumulation of resistance genes.
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Affiliation(s)
- Qian Wang
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yue Liu
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Ran Chen
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Meng Zhang
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Zaifeng Si
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Yueling Wang
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yan Jin
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yuanyuan Bai
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Zhen Song
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Xinglun Lu
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Mingju Hao
- Shandong Medicine and Health Key Laboratory of Laboratory Medicine, Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China.
| | - Yingying Hao
- Department of Clinical Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
- Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
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Ofosu-Appiah F, Acquah EE, Mohammed J, Sakyi Addo C, Agbodzi B, Ofosu DAS, Myers CJ, Mohktar Q, Ampomah OW, Ablordey A, Amissah NA. Klebsiella pneumoniae ST147 harboring blaNDM-1, multidrug resistance and hypervirulence plasmids. Microbiol Spectr 2024; 12:e0301723. [PMID: 38315028 PMCID: PMC10913492 DOI: 10.1128/spectrum.03017-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 12/17/2023] [Indexed: 02/07/2024] Open
Abstract
The spread of hypervirulent (hv) and carbapenem-/multidrug-resistant Klebsiella pneumoniae is an emerging problem in healthcare settings. The New Delhi metallo-β-lactamase-1 (blaNDM-1) is found in Enterobacteriaceae including K. pneumoniae. The blaNDM-1 is capable of hydrolyzing β-lactam antibiotics which are used for treatment of severe infections caused by multidrug-resistant Gram-negative bacteria. This is associated with the unacceptably high mortality rate in immunocompromised burn injury patients. This study reports on the characterization of blaNDM-1 gene and virulence factors in hv carbapenem-/multidrug-resistant K. pneumoniae ST147 in the burns unit of a tertiary teaching hospital during routine surveillance. Two K. pneumoniae strains were obtained from wounds of burn-infected patients from May 2020 to July 2021. The hypervirulence genes and genetic context of the blaNDM-1 gene and mobile genetic elements potentially involved in the transposition of the gene were analyzed. We identified a conserved genetic background and an IS26 and open reading frame flanking the blaNDM-1 gene that could suggest its involvement in the mobilization of the gene. The plasmid harbored additional antibiotic resistance predicted regions that were responsible for resistance to almost all the routinely used antibiotics. To ensure the identification of potential outbreak strains during routine surveillance, investigations on resistance genes and their environment in relation to evolution are necessary for molecular epidemiology.IMPORTANCEData obtained from this study will aid in the prompt identification of disease outbreaks including evolving resistance and virulence of the outbreak bacteria. This will help establish and implement antimicrobial stewardship programs and infection prevention protocols in fragile health systems in countries with limited resources. Integration of molecular surveillance and translation of whole-genome sequencing in routine diagnosis will provide valuable data for control of infection. This study reports for the first time a high-risk clone K. pneumoniae ST147 with hypervirulence and multidrug-resistance features in Ghana.
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Affiliation(s)
- Frederick Ofosu-Appiah
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, Ghana
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Ezra E. Acquah
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Jibril Mohammed
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Comfort Sakyi Addo
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Bright Agbodzi
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Dorcas A. S. Ofosu
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Charles J. Myers
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Quaneeta Mohktar
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Opoku-Ware Ampomah
- The Burns Unit, Reconstructive Plastic Surgery and Burns Unit, Korle Bu Teaching Hospital, Accra, Ghana
| | - Anthony Ablordey
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Nana Ama Amissah
- Department of Bacteriology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
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Fang J, Wang G, Kang X, Pan Z, Mei Y, Chen H, Liu Y, Xiang T. Analysis of the hypovirulent Klebsiella pneumoniae with the NDM-5 gene on IncN plasmids. Microbiol Spectr 2024; 12:e0344323. [PMID: 38019003 PMCID: PMC10783101 DOI: 10.1128/spectrum.03443-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 10/17/2023] [Indexed: 11/30/2023] Open
Abstract
IMPORTANCE It is crucial to strengthen the ongoing clinical surveillance of non-highly virulent, multi-resistant Klebsiella pneumoniae.
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Affiliation(s)
- Jianhua Fang
- Department of Infectious disease, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Department of Infectious disease, Nanchang University, Nanchang, China
| | - Guoyu Wang
- Department of Hospital Infection Control, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiuhua Kang
- Department of Hospital Infection Control, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhenhui Pan
- Department of Pediatrics, Nanchang University, Nanchang, China
- Department of Pediatrics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Yanfang Mei
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Huade Chen
- Department of Infectious disease, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Department of Infectious disease, Nanchang University, Nanchang, China
| | - Yang Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Tianxin Xiang
- Department of Hospital Infection Control, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Jiangxi Hospital of China-Japan Friendship Hospital, Nanchang, China
- Jiangxi Medical Center for Critical Public Health Events, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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Mendes G, Santos ML, Ramalho JF, Duarte A, Caneiras C. Virulence factors in carbapenem-resistant hypervirulent Klebsiella pneumoniae. Front Microbiol 2023; 14:1325077. [PMID: 38098668 PMCID: PMC10720631 DOI: 10.3389/fmicb.2023.1325077] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 11/16/2023] [Indexed: 12/17/2023] Open
Abstract
Hypervirulence and carbapenem-resistant have emerged as two distinct evolutionary pathotypes of Klebsiella pneumoniae, with both reaching their epidemic success and posing a great threat to public health. However, as the boundaries separating these two pathotypes fade, we assist a worrisome convergence in certain high-risk clones, causing hospital outbreaks and challenging every therapeutic option available. To better understand the basic biology of these pathogens, this review aimed to describe the virulence factors and their distribution worldwide among carbapenem-resistant highly virulent or hypervirulent K. pneumoniae strains, as well as to understand the interplay of these virulence strains with the carbapenemase produced and the sequence type of such strains. As we witness a shift in healthcare settings where carbapenem-resistant highly virulent or hypervirulent K. pneumoniae are beginning to emerge and replace classical K. pneumoniae strains, a better understanding of these strains is urgently needed for immediate and appropriate response.
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Affiliation(s)
- Gabriel Mendes
- Microbiology Research Laboratory on Environmental Health, Institute of Environmental Health (ISAMB), Associate Laboratory TERRA, Faculty of Medicine, Universidade de Lisboa, Lisbon, Portugal
| | - Maria Leonor Santos
- Microbiology Research Laboratory on Environmental Health, Institute of Environmental Health (ISAMB), Associate Laboratory TERRA, Faculty of Medicine, Universidade de Lisboa, Lisbon, Portugal
| | - João F. Ramalho
- Microbiology Research Laboratory on Environmental Health, Institute of Environmental Health (ISAMB), Associate Laboratory TERRA, Faculty of Medicine, Universidade de Lisboa, Lisbon, Portugal
| | - Aida Duarte
- Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
- Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health and Science, Almada, Portugal
| | - Cátia Caneiras
- Microbiology Research Laboratory on Environmental Health, Institute of Environmental Health (ISAMB), Associate Laboratory TERRA, Faculty of Medicine, Universidade de Lisboa, Lisbon, Portugal
- Egas Moniz Center for Interdisciplinary Research, Egas Moniz School of Health and Science, Almada, Portugal
- Institute of Preventive Medicine and Public Health, Faculty of Medicine, Universidade de Lisboa, Lisbon, Portugal
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Abdullah S, Almusallam A, Li M, Mahmood MS, Mushtaq MA, Eltai NO, Toleman MA, Mohsin M. Whole genome-based genetic insights of blaNDM producing clinical E. coli isolates in hospital settings of Pakistan. Microbiol Spectr 2023; 11:e0058423. [PMID: 37668386 PMCID: PMC10581159 DOI: 10.1128/spectrum.00584-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 07/02/2023] [Indexed: 09/06/2023] Open
Abstract
Carbapenem resistance among Enterobacterales has become a global health concern. Clinical Escherichia coli isolates producing the metallo β-lactamase NDM have been isolated from two hospitals in Faisalabad, Pakistan. These E. coli strains were characterized by MALDI-TOF, PCR, antimicrobial susceptibility testing, XbaI and S1 nuclease pulsed-field gel electrophoresis (PFGE), conjugation assay, DNA hybridization, whole genome sequencing, bioinformatic analysis, and Galleria mellonella experiments. Thirty-four blaNDM producing E. coli strains were identified among 52 nonduplicate carbapenem-resistant strains. More than 90% of the isolates were found to be multidrug resistant by antimicrobial susceptibility testing. S1 PFGE confirmed the presence of blaNDM gene on plasmids ranging from 40 kbps to 250 kbps, and conjugation assays demonstrated transfer frequencies of blaNDM harboring plasmids ranging from 1.59 × 10-1 to 6.46 × 10-8 per donor. Whole genome sequencing analysis revealed blaNDM-5 as the prominent NDM subtype with the highest prevalence of blaOXA-1, blaCTX-M-15, aadA2, aac(6')-Ib-cr, and tet(A) associated resistant determinants. E. coli sequence types: ST405, ST361, and ST167 were prominent, and plasmid Inc types: FII, FIA, FIB, FIC, X3, R, and Y, were observed among all isolates. The genetic environment of blaNDM region on IncF plasmids included partial ISAba125, the bleomycin ble gene, and a class I integron. The virulence genes terC, traT, gad, fyuA, irp2, capU, and sitA were frequently observed, and G. mellonella experiments showed that virulence correlated with the number of virulence determinants. A strong infection control management in the hospital is necessary to check the emergence of carbapenem resistance in Gram-negative bacteria.IMPORTANCEWe describe a detailed analysis of highly resistant clinical E. coli isolates from two tertiary care centers in Pakistan including carbapenem resistance as well as common co-resistance mechanisms. South Asia has a huge problem with highly resistant E. coli. However, we find that though these isolates are very difficult to treat they are of low virulence. Thus the Western world has an increasing problem with virulent E. coli that are mostly of low antibiotic resistance, whereas, South Asia has an increasing problem with highly resistant E. coli that are of low virulence potential. These observations allow us to start to devise methodologies to limit both virulence and resistance and combat problems in developing nations as well as the Western world.
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Affiliation(s)
- Sabahat Abdullah
- Institute of Microbiology, University of Agriculture, Faisalabad, Pakistan
| | - Abdulrahman Almusallam
- Department of Medical Microbiology, School of Medicine, Institute of Infection and Immunity, Cardiff University, Cardiff, United Kingdom
| | - Mei Li
- Department of Medical Microbiology, School of Medicine, Institute of Infection and Immunity, Cardiff University, Cardiff, United Kingdom
| | | | | | - Nahla O. Eltai
- Biomedical Research Center, Qatar University, Doha, Qatar
| | - Mark A. Toleman
- Department of Medical Microbiology, School of Medicine, Institute of Infection and Immunity, Cardiff University, Cardiff, United Kingdom
| | - Mashkoor Mohsin
- Institute of Microbiology, University of Agriculture, Faisalabad, Pakistan
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Liu P, Yang A, Tang B, Wang Z, Jian Z, Liu Y, Wang J, Zhong B, Yan Q, Liu W. Molecular epidemiology and clinical characteristics of the type VI secretion system in Klebsiella pneumoniae causing abscesses. Front Microbiol 2023; 14:1181701. [PMID: 37266024 PMCID: PMC10230222 DOI: 10.3389/fmicb.2023.1181701] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/28/2023] [Indexed: 06/03/2023] Open
Abstract
Purpose The type VI system (T6SS) has the potential to be a new virulence factor for hypervirulent Klebsiella pneumoniae (hvKp) strains. This study aimed to characterize the molecular and clinical features of T6SS-positive and T6SS-negative K. pneumoniae isolates that cause abscesses. Patients and methods A total of 169 non-duplicate K. pneumoniae strains were isolated from patients with abscesses in a tertiary hospital in China from January 2018 to June 2022, and clinical data were collected. For all isolates, capsular serotypes, T6SS genes, virulence, and drug resistance genes, antimicrobial susceptibility testing, and biofilm formation assays were assessed. Multilocus sequence typing was used to analyze the genotypes of hvKp. T6SS-positive hvKp, T6SS-negative hvKp, T6SS-positive cKP, and T6SS-negative cKP (n = 4 strains for each group) were chosen for the in vivo Galleria mellonella infection model and in vitro competition experiments to further explore the microbiological characteristics of T6SS-positive K. pneumoniae isolates. Results The positive detection rate for T6SS was 36.1%. The rates of hvKp, seven virulence genes, K1 capsular serotype, and ST23 in T6SS-positive strains were all higher than those in T6SS-negative strains (p < 0.05). Multivariate logistic regression analysis indicated that the carriage of aerobactin (OR 0.01) and wcaG (OR 33.53) were independent risk factors for T6SS-positive strains (p < 0.05). The T6SS-positive strains had a stronger biofilm-forming ability than T6SS-negative strains (p < 0.05). The T6SS-positive and T6SS-negative strains showed no significant differences in competitive ability (p = 0.06). In the in vivo G. mellonella infection model, the T6SS(+)/hvKP group had the worst prognosis. Except for cefazolin and tegacyclin, T6SS-positive isolates displayed a lower rate of antimicrobial resistance to other drugs (p < 0.05). The T6SS-positive isolates were more likely to be acquired from community infections (p < 0.05). Conclusion Klebsiella pneumoniae isolates causing abscesses have a high prevalence of T6SS genes. T6SS-positive K. pneumoniae isolates are associated with virulence, and the T6SS genes may be involved in the hvKp virulence mechanism.
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Affiliation(s)
- Peilin Liu
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Awen Yang
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Bin Tang
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhiqian Wang
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zijuan Jian
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yanjun Liu
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jiahui Wang
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
| | - Baiyun Zhong
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qun Yan
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Wenen Liu
- Department of Clinical Laboratory, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
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Dong H, Li Y, Cheng J, Xia Z, Liu W, Yan T, Chen F, Wang Z, Li R, Shi J, Qin S. Genomic Epidemiology Insights on NDM-Producing Pathogens Revealed the Pivotal Role of Plasmids on blaNDM Transmission. Microbiol Spectr 2022; 10:e0215621. [PMID: 35225688 PMCID: PMC9049954 DOI: 10.1128/spectrum.02156-21] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/30/2022] [Indexed: 12/14/2022] Open
Abstract
Incidences of nosocomial infections mediated by New Delhi metallo-β-lactamase (NDM) enzyme-producing Enterobacterales are increasing globally, resulting in a great burden to public health. The carbapenem-resistant Enterobacterales (CRE) were collected from Henan, China during 2013-2016. The blaNDM-positive strains were characterized using PCR, antimicrobial susceptibility testing, conjugation assay, S1 nuclease pulsed-field gel electrophoresis (S1-PFGE), Southern blot, whole-genome sequencing (WGS), and bioinformatics analysis. Eighty-one NDM-producing strains were identified among 391 nonduplicate CRE strains. Among them, four strains cocarried mcr and blaNDM genes, and two carried blaIMP-4 and blaNDM genes. The coexistence of blaNDM-5 and mcr-9 in Enterobacter hormaechei was found for the first time. In total, four blaNDM subtypes were identified. Among them, blaNDM-1 and blaNDM-5 were predominant. There was an obvious increasing trend in blaNDM-5 from 2013 to 2016. Thirteen different bacterial species were found among the 81 strains, and Escherichia coli was the dominant strain. blaNDM genes were located on nine different Inc-type plasmids, most of them on the IncX3 plasmids, except for the Pr-15-2-50 strain, which was located on the chromosome. We characterized two novel plasmids: the IncHI5-like plasmid carrying blaNDM-9 found in K. pneumonia, and the IncI1 blaNDM-5-positive plasmid. These findings provide the genomic basis for the widespread transmission of blaNDM and pave the way for the formulation of more effective monitoring and control methods. IMPORTANCE To control the emergence and transmission of CRE, it is important to perform retrospective genomic investigations. It is important to evaluate the plasmid diversity, genetic environment, and evolutionary relationships of the blaNDM-positive clinical strains in the early transmission stages. This study conducted an in-depth analysis of blaNDM-positive pathogens during a 4-year period using different methods for observing the high prevalence and active transmission of blaNDM-positive CRE. Moreover, we also explored the coexistence of the blaNDM and mcr, a clinically important mobile colistin resistance gene. This study shows that the prevalence of blaNDM-positive pathogens in Henan is high and the isolation rates increase each year. Moreover, plasmid-mediated horizontal transfer plays an important role in blaNDM dissemination. The co-occurrence of multiple resistance genes highlighted a long-lasting evolutionary pathway. Therefore, we have suggested the long-term continuous surveillance of clinical pathogens carrying blaNDM to learn the future transmission trend and curb the public health risk caused by CRE.
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Affiliation(s)
- Huiyue Dong
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Yan Li
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jing Cheng
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Ziwei Xia
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Wentian Liu
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Tingting Yan
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Fangfang Chen
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Zhiqiang Wang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Ruichao Li
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jinjin Shi
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
| | - Shangshang Qin
- School of Pharmaceutical Sciences, Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, Zhengzhou University, Zhengzhou, Henan, China
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9
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Mouftah SF, Pál T, Higgins PG, Ghazawi A, Idaghdour Y, Alqahtani M, Omrani AS, Rizvi TA, Sonnevend Á. Diversity of carbapenem-resistant Klebsiella pneumoniae ST14 and emergence of a subgroup with KL64 capsular locus in the Arabian Peninsula. Eur J Clin Microbiol Infect Dis 2021:10.1007/s10096-021-04384-2. [PMID: 34855011 DOI: 10.1007/s10096-021-04384-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
To understand the reasons of successful spread of carbapenem-resistant Klebsiella pneumoniae ST14 (CRKP-ST14) in countries of the Arabian Peninsula, the resistome, capsular locus, carbapenemase carrying plasmid types, and core genome of isolates from the region were compared to global isolates. Thirty-nine CRKP-ST14 strains isolated from 13 hospitals in the United Arab Emirates, Bahrain, and Saudi Arabia were selected for whole genome sequencing on Illumina MiSeq platform based on the variety of carbapenemase genes carried and plasmids bearing these genes. Their resistome, capsular locus, and core genome MLST were compared to 173 CRKP-ST14 genomes available in public databases. The selected 39 CRKP-ST14 produced either NDM-1, OXA-48, OXA-162, OXA-232, KPC-2, or co-produced NDM-1 and an OXA-48-like carbapenemase. cgMLST revealed three clusters: 16 isolates from five UAE cities (C1), 11 isolates from three UAE cities and Bahrain (C2), and 5 isolates from Saudi Arabia (C3), respectively, and seven singletons. Resistance gene profile, carbapenemase genes, and their plasmid types were variable in both C1 and C2 clusters. The majority of CRKP-ST14 had KL2, but members of the C2 cluster and two further singletons possessed KL64 capsular locus. Based on cgMLST comparison of regional and global isolates, CRKP-ST14 with KL64 from four continents formed a distinct cluster, suggesting a recent emergence and spread of this variant. Our findings confirmed clonal transmission coupled with likely horizontal gene transfer in carbapenem-resistant Klebsiella pneumoniae ST14. Dissemination of this genetically flexible, highly resistant clone warrants further monitoring.
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Affiliation(s)
- Shaimaa F Mouftah
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
- Department of Biomedical Sciences, Zewail City of Science and Technology, Giza, Egypt
| | - Tibor Pál
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Pécs, Hungary
| | - Paul G Higgins
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Cologne, Germany
| | - Akela Ghazawi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Youssef Idaghdour
- Pathology and Laboratory Medicine Department, BDF Hospital - Royal Medical Services, Riffa, Kingdom of Bahrain
| | - Manaf Alqahtani
- New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Ali S Omrani
- King Faisal Specialty Hospital, Riyadh, Saudi Arabia
- Communicable Diseases Center Hamad Medical Corporation, Doha, Qatar
| | - Tahir A Rizvi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
- Zayed Bin Sultan Al Nahyan Center for Health Sciences, Al Ain, United Arab Emirates
| | - Ágnes Sonnevend
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
- Department of Medical Microbiology and Immunology, Medical School, University of Pécs, Pécs, Hungary.
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10
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Li Y, Tang M, Dai X, Zhou Y, Zhang Z, Qiu Y, Li C, Zhang L. Whole-Genomic Analysis of NDM-5-Producing Enterobacteriaceae Recovered from an Urban River in China. Infect Drug Resist 2021; 14:4427-4440. [PMID: 34737583 PMCID: PMC8559237 DOI: 10.2147/idr.s330787] [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: 07/23/2021] [Accepted: 09/24/2021] [Indexed: 12/17/2022] Open
Abstract
Purpose Three NDM-5-producing Enterobacteriaceae (Escherichia coli, Klebsiella pneumoniae, and Citrobacter braakii, one each) were isolated during a screening study for the presence of carbapenemase-producing Enterobacteriaceae (CPE) strains in urban rivers in China. The aim of the present study was to characterize these NDM-5-producing isolates by using whole-genome analysis. Methods In vitro susceptibility testing was performed using the broth microdilution method. Conjugation assay was carried out to investigate the transferability of blaNDM-5-harboring plasmids. Whole-genome sequencing was performed using an Illumina HiSeq combined with the PacBio RSII system. The genetic characteristics of the blaNDM-5-harboring plasmids were analyzed. Antimicrobial resistance genes and virulence genes were identified from the genome sequences. Phylogenetic analysis was performed based on core genome. Results Antimicrobial susceptibility testing showed that all three isolates were resistant to carbapenems, cephalosporins, quinolones, and aminoglycosides, and susceptible to colistin. Whole-genome sequencing showed that each isolate carried multiple antibiotic resistance genes mediating multidrug resistance, and harbored numerous virulence genes, some of which were located on plasmids. In these isolates, blaNDM-5 was carried by an IncX3 plasmid in K. pneumoniae and C. braakii, and on an IncR/IncX1 plasmid in E. coli. Conjugation experiments showed that these blaNDM-5-haboring plasmids were successfully transferred to E. coli J53. Phylogenetic analysis revealed that E. coli SCLZR49 was present in a cluster with isolates of different origin, K. pneumoniae SCLZR50 was mainly clustered with clinical isolates, and C. braakii SCLZR53 had closely genetic relationship with environmental isolates. Conclusion This study revealed contamination of the urban river ecosystems by clinically significant carbapenemase gene blaNDM-5, raising the possibility of plasmid transmission into the environmental from humans and highlighting the need for a constant surveillance of CPE in the environment under the “One-Health” perspective.
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Affiliation(s)
- Ying Li
- Department of Immunology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Immunological Technology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Min Tang
- Department of Laboratory Medicine, the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Xiaoyi Dai
- Department of Pathogenic Biology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Pathogen Biology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Yingshun Zhou
- Department of Pathogenic Biology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Pathogen Biology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Zhikun Zhang
- Department of Pathogenic Biology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Pathogen Biology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Yichuan Qiu
- Department of Pathogenic Biology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Pathogen Biology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Chengwen Li
- Department of Immunology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Immunological Technology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Luhua Zhang
- Department of Pathogenic Biology, School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan, People's Republic of China.,Pathogen Biology Platform, Southwest Medical University, Luzhou, Sichuan, People's Republic of China
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11
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Wei DD, Xiong XS, Mei YF, Du FL, Wan LG, Liu Y. Microbiological and Clinical Characteristics of Klebsiella pneumoniae Isolates of K57 Capsular Serotype in China. Microb Drug Resist 2021; 27:391-400. [PMID: 32762612 DOI: 10.1089/mdr.2018.0456] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Dan-dan Wei
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Xiao-shun Xiong
- Department of Clinical Microbiology, Second Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Yan-fang Mei
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Fang-ling Du
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - La-gen Wan
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Yang Liu
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
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12
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Luo K, Tang J, Qu Y, Yang X, Zhang L, Chen Z, Kuang L, Su M, Mu D. Nosocomial infection by Klebsiella pneumoniae among neonates: a molecular epidemiological study. J Hosp Infect 2020; 108:174-180. [PMID: 33290814 DOI: 10.1016/j.jhin.2020.11.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/17/2020] [Accepted: 11/26/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND Nosocomial infection by Klebsiella pneumoniae (Kp) and drug resistance of Kp among neonates is a major concern. Hypervirulent K. pneumoniae (hvKp) infections are gradually increasing worldwide. Carbapenem-resistant hvKp infection has brought challenges to clinical treatment. AIM To evaluate the changes in drug resistance trends of Kp strains in neonatal intensive care unit (NICU) nosocomial infections, to analyse drug resistance genes and virulence genes of carbapenem-resistant K. pneumoniae (CRKP) and to identify whether these CRKP strains are hvKp. METHODS A total of 80 neonates with Kp nosocomial infections from 2013 to 2018 were retrospectively studied. Drug susceptibility testing was performed on 80 Kp strains, among which the 12 CRKP strains were further studied. FINDINGS Kp accounted for 26.9% of nosocomial infections in the NICU. CRKP strains accounted for 15.0%. Among the 80 nosocomial infection Kp strains, CRKP strains accounted for 33.3% and 53.3% in 2017 and 2018 respectively. One of the 12 CRKP strains was positive in the drawing test. The 12 CRKP strains were divided into four complete genome sequence types: cgST1 (N = 2), cgST2 (N = 1), cgST3 (N = 1), and cgST4 (N = 8). Among genes that mediated carbapenem resistance, strains of cgST4 carried NDM-5, strains of cgST2 and cgST3 carried NDM-1, and strains of cgST1 carried IMP-4. None of the 12 CRKP strains carried rmpA/rmpA2 (highly related with hvKp). CONCLUSION Nosocomial infections of CRKP among neonates are becoming common, but no hvKp was found among the CRKP strains in this study.
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Affiliation(s)
- K Luo
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - J Tang
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China.
| | - Y Qu
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - X Yang
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - L Zhang
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - Z Chen
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - L Kuang
- Department of Laboratory, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - M Su
- Department of Laboratory, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
| | - D Mu
- Department of Neonatology, Sichuan University, West China Second Hospital, Chengdu, Sichuan, China
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13
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Kopotsa K, Mbelle NM, Osei Sekyere J. Epigenomics, genomics, resistome, mobilome, virulome and evolutionary phylogenomics of carbapenem-resistant Klebsiella pneumoniae clinical strains. Microb Genom 2020; 6:mgen000474. [PMID: 33170117 PMCID: PMC8116673 DOI: 10.1099/mgen.0.000474] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/28/2020] [Indexed: 12/12/2022] Open
Abstract
Carbapenem-resistant Klebsiella pneumoniae (CRKP) remains a major clinical pathogen and public health threat with few therapeutic options. The mobilome, resistome, methylome, virulome and phylogeography of CRKP in South Africa and globally were characterized. CRKP collected in 2018 were subjected to antimicrobial susceptibility testing, screening by multiplex PCR, genotyping by repetitive element palindromic (REP)-PCR, plasmid size, number, incompatibility and mobility analyses, and PacBio's SMRT sequencing (n=6). There were 56 multidrug-resistant CRKP, having blaOXA-48-like and blaNDM-1/7 carbapenemases on self-transmissible IncF, A/C, IncL/M and IncX3 plasmids endowed with prophages, traT, resistance islands, and type I and II restriction modification systems (RMS). Plasmids and clades detected in this study were respectively related to globally established/disseminated plasmids clades/clones, evincing transboundary horizontal and vertical dissemination. Reduced susceptibility to colistin occurred in 23 strains. Common clones included ST307, ST607, ST17, ST39 and ST3559. IncFIIk virulent plasmid replicon was present in 56 strains. Whole-genome sequencing of six strains revealed least 41 virulence genes, extensive ompK36 mutations, and four different K- and O-loci types: KL2, KL25, KL27, KL102, O1, O2, O4 and O5. Types I, II and III RMS, conferring m6A (GATC, GATGNNNNNNTTG, CAANNNNNNCATC motifs) and m4C (CCWGG) modifications on chromosomes and plasmids, were found. The nature of plasmid-mediated, clonal and multi-clonal dissemination of blaOXA-48-like and blaNDM-1 mirrors epidemiological trends observed for closely related plasmids and sequence types internationally. Worryingly, the presence of both blaOXA-48 and blaNDM-1 in the same isolates was observed. Plasmid-mediated transmission of RMS, virulome and prophages influence bacterial evolution, epidemiology, pathogenicity and resistance, threatening infection treatment. The influence of RMS on antimicrobial and bacteriophage therapy needs urgent investigation.
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Affiliation(s)
- Katlego Kopotsa
- Department of Medical Microbiology, School of Medicine, Faculty of Health Sciences, University of Pretoria, 0084 Pretoria, South Africa
| | - Nontombi M. Mbelle
- Department of Medical Microbiology, School of Medicine, Faculty of Health Sciences, University of Pretoria, 0084 Pretoria, South Africa
| | - John Osei Sekyere
- Department of Medical Microbiology, School of Medicine, Faculty of Health Sciences, University of Pretoria, 0084 Pretoria, South Africa
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14
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Sandoval MAS, Roxas MCA, Salamat MS, Pauig J, Tabu I, Tonga AD. 3-in-1: bilateral subcutaneous leg abscesses and liver abscess from Klebsiella pneumoniae. BMJ Case Rep 2020; 13:13/9/e235926. [PMID: 32900735 DOI: 10.1136/bcr-2020-235926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Hypervirulent strains of Klebsiella pneumoniae are known to cause liver abscesses and other metastatic infections. Being Asian and having diabetes are known host risk factors. Here we present an unusual case of a Filipino ballet dancer-choreographer with diabetes presenting with bilateral leg pains initially thought to be cellulitis, but was eventually diagnosed as bilateral subcutaneous leg abscesses. He also had a liver abscess, thankfully asymptomatic, which was only discovered on imaging. The occurrence of three distant abscesses in one patient, hence '3-in-1,' makes this case worth reporting. Bilateral subcutaneous leg abscesses as the presenting manifestation of this infection have not been reported yet. We hypothesise that his occupation which makes use of frequent contractions of leg muscles led to increased blood flow and preferentially directed blood-borne bacteria to localise in both legs. We have also characterised the pathogen with regards to its hypermucoviscous phenotype, capsular type, virulence genes and phylogeny.
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Affiliation(s)
- Mark Anthony Santiago Sandoval
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, College of Medicine and Philippine General Hospital, University of the Philippines Manila, Manila, Philippines .,Department of Physiology, College of Medicine, University of the Philippines Manila, Manila, Philippines
| | - Ma Carrissa Abigail Roxas
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, College of Medicine and Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Maria Sonia Salamat
- Division of Infectious Disease, Department of Medicine, College of Medicine and Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Jarold Pauig
- Department of Radiology, College of Medicine and Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Irewin Tabu
- Department of Orthopedics, College of Medicine and Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Angelo Dela Tonga
- Institute of Molecular Biology and Biotechnology, National Institutes of Health, University of the Philippines Manila, Manila, Philippines
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15
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Su S, Zhang J, Zhao Y, Yu L, Wang Y, Wang Y, Bao M, Fu Y, Li C, Zhang X. Outbreak of KPC-2 Carbapenem-resistant Klebsiella pneumoniae ST76 and Carbapenem-resistant K2 Hypervirulent Klebsiella pneumoniae ST375 strains in Northeast China: molecular and virulent characteristics. BMC Infect Dis 2020; 20:472. [PMID: 32616018 PMCID: PMC7331116 DOI: 10.1186/s12879-020-05143-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 06/10/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Carbapenem-resistant hypervirulent Klebsiella pneumoniae strains have recently come into existence worldwide; however, researchers in northeast China are not aware of their clinical features and molecular characteristics. METHODS Here, the molecular and virulent characteristics of 44 carbapenem-resistant K. pneumoniae (CRKP) isolates collected from January 2015 to December 2017 were studied. Multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE) were carried out to define the clonal relatedness among the isolates. PCR and capsular serotyping of the virulence-associated genes, as well as biofilm formation and serum complement-mediated killing assays, were employed to determine the virulent potential. The genomic features and associated mobile genetic elements of JmsCRE57 were detected by whole genome sequencing. RESULTS The only positive isolate was JmsCRE57, which belonged to the ST375 serotype K2 that expressed uge, mrkD, fimH, kpn, aerobactin and rmpA virulence-associated genes and showed strong biofilm formation and serum sensitivity. Sequencing results showed that the JmsCRE57 genome mainly consisted of a circular chromosome, three antimicrobial resistant plasmids and a virulent plasmid. The antimicrobial resistant plasmid expressing blaKPC-2, blaCTX-M-15, aph(3″)-Ib, aph(6)-Id, qnrB1, aac(3)-IIa, aac(6')-Ib-cr, blaOXA-1, blaTEM-1B, catB4, sul2, dfrA14 and blaSHV-99. The virulent plasmid belonged to the IncHI1B group, which is mainly composed of mucoid phenotype genes and siderophore-associated genes. The remaining CRKP strains that expressed uge, fimH, mrkD and kpn virulence-associated genes were not successfully typed. CONCLUSION Our results provide new insights on the epidemiology of carbapenem-resistant K2 hypervirulent K. pneumoniae ST375 and CRKP ST76 strains in northeast China, which may help control their future outbreaks.
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Affiliation(s)
- Shanshan Su
- Yongchuan hospital of Chongqing Medical University, Chongqing, China.,The First People's Hospital of Jingzhou City, Jingzhou, Hubei, China
| | - Jisheng Zhang
- Yongchuan hospital of Chongqing Medical University, Chongqing, China.,First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China
| | - Yongxin Zhao
- First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China
| | - Lan Yu
- First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China
| | - Yong Wang
- First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China
| | - Yuchao Wang
- First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China
| | - Mingjia Bao
- Center for Disease Control and Prevention, Jiamusi, Heilongjiang, China
| | - Yu Fu
- Center for Disease Control and Prevention, Jiamusi, Heilongjiang, China
| | - Chunjiang Li
- First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China.
| | - Xiaoli Zhang
- Yongchuan hospital of Chongqing Medical University, Chongqing, China. .,First Affiliated Hospital of Jiamusi University, Jiamusi, Heilongjiang, China.
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16
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Yang Y, Li X, Zhang Y, Liu J, Hu X, Nie T, Yang X, Wang X, Li C, You X. Characterization of a hypervirulent multidrug-resistant ST23 Klebsiella pneumoniae carrying a bla CTX-M-24 IncFII plasmid and a pK2044-like plasmid. J Glob Antimicrob Resist 2020; 22:674-679. [PMID: 32439569 DOI: 10.1016/j.jgar.2020.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/27/2020] [Accepted: 05/12/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE To characterise a multidrug-resistant hypervirulent Klebsiella pneumoniae (MDR-hvKp) strain (Kpn1693) isolated from the sputum of a 67-year-old male patient diagnosed as having bronchiectasis with infection in Northern China. METHODS Drug susceptibility testing was performed by broth microdilution method, and the hypervirulent phenotype of the strain was analysed by string test and a mice systemic infection model. The whole genome of Kpn1693 was sequenced using PacBio Sequel platform, de novo assembly was performed using SMRT Link v5.0.1 software and the GeneMarkS program was used to retrieve the related coding gene. Incompatibility types, virulence-associated genes and antimicrobial resistance genes were searched for using the PlasmidFinder database, virulence factors of pathogenic bacteria database (VFDB) and Comprehensive Antibiotic Research Database (CARD). The phylogenetic relationship of pKpn1693-CTXM with other IncFII plasmids carrying variants of MEGA X software. RESULTS The Kpn1693 strain showed resistance to multiple antimicrobials and a hypervirulent phenotype. Bioinformatic analysis revealed that Kpn1693 had a 5 331 308-bp-long chromosome (cKpn1693), and harboured two plasmids of 192 347 bp (pK2044-like virulent plasmid, IncHI1B/IncFIB, pKpn1693-Vir) and 70 307 bp (blaCTX-M-24-bearing IncFII plasmid IncFII, pKpn1693-CTXM). CONCLUSION We reported an MDR-hvKp strain with a blaCTX-M-24-carrying IncFII-type plasmid and a pK2044-like virulent plasmid, and this is the first report of a blaCTX-M-24-bearing IncFII plasmid carried by an MDR-hvKp.
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Affiliation(s)
- Yan Yang
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xue Li
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Youwen Zhang
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jianhua Liu
- Department of Respiratory Medicine, The First Affiliated Hospital of Hebei North University, Zhangjiakou, China
| | - Xinxin Hu
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Tongying Nie
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xinyi Yang
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiukun Wang
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Congran Li
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
| | - Xuefu You
- Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
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17
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Yin L, He L, Miao J, Yang W, Wang X, Ma J, Wu N, Cao Y, Wang L, Lu G, Li L, Lu C, Hu J, Zhang L, Zhao B, Zhai X, Wang C. Actively surveillance and appropriate patients placements' contact isolation dramatically decreased Carbapenem-Resistant Enterobacteriaceae infection and colonization in pediatric patients in China. J Hosp Infect 2020; 105:S0195-6701(20)30130-4. [PMID: 32243954 DOI: 10.1016/j.jhin.2020.03.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/24/2020] [Indexed: 11/23/2022]
Abstract
BACKGROUND With the increasing use of carbapenems in clinic practice, carbapenem-resistant Enterobacteriaceae (CRE) has also increased, thus posing a significant threat to human health. AIM To assess the effects of CRE colonization active screening and various CRE patient placements implemented in decreasing CRE infection risk. METHODS CRE colonization screening and various CRE patient placements were performed across CRE high-risk departments (PICU, NICU, neonatal wards and hematology departments) between 2017 and 2018, respectively. FINDING In 2018, more than 80% neonatal CRE positive patients were isolated using single room or same room isolation, and more than 50% non-neonatal patients were, with no cohort placement. The CRE nosocomial infection incidences decreased from 1.96% to 0.63% in NICU, and from 0.57% to 0.30% in neonatal wards (all P<0.05) while no significant changes were found in the other departments. The CRE colonization incidence at different length hospital stay (LOS) decreased at 8-14days and >14days LOS in CRE high-risk departments (all P<0.05). In addition, 62.5% clinical strains, 66.7% screening strains, and 74.1% nosocomial infection strains were belonged to CC17 complex group in neonatal isolates; while, 56.6%, 47.5% and 100% strains mentioned above were belonged to CC11 complex group in non-neonatal isolates respectively. The predominant carbapenemase gene was blaNDM-1 (98%) in neonatal and blaKPC-2 (70%) in non-neonatal CR-KP stains. CONCLUSIONS Active CRE colonization surveillance and CRE positive patient propriety placement may decrease the CRE infection risk. Neonatal and non-neonatal CR-KP isolates showed different CRE molecular characteristics, which could further benefit CRE infection precaution and antibiotic therapy.
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Affiliation(s)
- Lijun Yin
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Leiyan He
- The Clinical Microbiology Laboratory, Children's Hospital of Fudan University, Shanghai, China
| | - Jin Miao
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Weiqing Yang
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Xiaohua Wang
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Jian Ma
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Nana Wu
- Department of Nosocomial Infection Control, Children's Hospital of Fudan University, Shanghai, China
| | - Yun Cao
- Department of neonatal intensive care unit, Children's Hospital of Fudan University, Shanghai, China
| | - Laishuan Wang
- Department of Neonatal room, Children's Hospital of Fudan University, Shanghai, China
| | - Guoping Lu
- Department of Pediatric Intensive Care Unit, Children's Hospital of Fudan University, Shanghai, China
| | - Liling Li
- Department of Nursing Department, Children's Hospital of Fudan University, Shanghai, China
| | - Chunmei Lu
- Department of Neonatal room, Children's Hospital of Fudan University, Shanghai, China
| | - Jing Hu
- Department of Pediatric Intensive Care Unit, Children's Hospital of Fudan University, Shanghai, China
| | - Lei Zhang
- The Clinical Microbiology Laboratory, Children's Hospital of Fudan University, Shanghai, China
| | - Bing Zhao
- Shanghai Pudong Center for Disease Control and Prevention, Shanghai, China
| | - Xiaowen Zhai
- Department of Hematology, Children's Hospital of Fudan University, Shanghai, China.
| | - Chuanqing Wang
- Department of Nosocomial Infection Control and the Clinical Microbiology Laboratory, Children's Hospital of Fudan University, Shanghai, China.
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18
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Remya P, Shanthi M, Sekar U. Occurrence and characterization of hyperviscous K1 and K2 serotype in Klebsiella pneumoniae. J Lab Physicians 2020; 10:283-288. [PMID: 30078963 PMCID: PMC6052812 DOI: 10.4103/jlp.jlp_48_18] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Klebsiella pneumoniae causes both nosocomial and community-associated infections. Hypervirulent K. pneumoniae (hvKP), new variant of K. pneumoniae, can cause invasive infections in young healthy individuals as well as in the immunocompromised population. Hypervirulent strains frequently belong to capsular serotypes K1 or K2. Emergence of antimicrobial resistance in hvKP is a cause for concern. AIM AND OBJECTIVE: The present study was done to detect the K1 and K2 serotypes among clinical isolates of K. pneumoniae, spectrum of infections caused by them and presence of common beta-lactamases encoding genes in them. MATERIALS AND METHODS: A total of 370 isolates of K. pneumoniae, isolated from various clinical samples over a period of 1 year was included in this study. Antibiotic susceptibility testing to various classes of antimicrobials was done as per Clinical and Laboratory Standard Institute guidelines. The presence of K2A (specific to serotype K2), magA (specific to serotype K1), and rmpA genes was detected by multiplex polymerase chain reaction (PCR). Extended-spectrum beta-lactamases (TEM, SHV, and CTX-M), plasmid-mediated AmpCs (MOX, CIT, DHA, ACC, EBC, and FOX), and carbapenemase genes (IMP, VIM, NDM, KPC, and OXA-48) were also determined by PCR. RESULTS: Among the 370 isolates, 8 harbored K2A gene and one harbored magA. rmpA gene was detected in three isolates along with K1 or K2 serotypes. Seven K2A-positive isolates were resistant to one or more classes of antimicrobials. The studied ESBL genes were present in four isolates. Two isolates harbored carbapenemase genes (NDM-1, OXA-48) along with ESBLs. CONCLUSION: K2 serotype is more prevalent among hvKP isolates. They can harbor ESBLs and Carbapenemase genes. K1 serotype is rather uncommon in K. pneumoniae. Acquisition of multidrug-resistant genes by these strains adds to their virulence and limits the treatment options.
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Affiliation(s)
- Poothakuzhiyil Remya
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
| | - Mariappan Shanthi
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
| | - Uma Sekar
- Department of Microbiology, Sri Ramachandra Medical College and Research Institute, Chennai, Tamil Nadu, India
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19
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Mbelle NM, Feldman C, Sekyere JO, Maningi NE, Modipane L, Essack SY. Pathogenomics and Evolutionary Epidemiology of Multi-Drug Resistant Clinical Klebsiella pneumoniae Isolated from Pretoria, South Africa. Sci Rep 2020; 10:1232. [PMID: 31988374 PMCID: PMC6985128 DOI: 10.1038/s41598-020-58012-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 01/09/2020] [Indexed: 11/14/2022] Open
Abstract
Antibiotic-resistant Klebsiella pneumoniae is increasingly being implicated in invasive infections worldwide with high mortalities. Forty-two multidrug resistant (MDR) K. pneumoniae isolates were collected over a 4-month period. Antimicrobial susceptibility was determined using Microscan. The evolutionary epidemiology, resistome, virulome and mobilome of the isolates were characterised using whole-genome sequencing and bioinformatics analysis. All isolates contained the blaCTX-M gene, whilst 41/42(97%) contained blaTEM, 36/42(86%) contained blaOXA and 35/42(83%) harboured blaSHV genes. Other resistance genes found included blaLEN, aac(6′)-lb-cr, qnrA, qnrB, qnrS, oqxAB, aad, aph, dfr, sul1, sul2, fosA, and cat genes. Fluoroquinolone and colistin resistance-conferring mutations in parC, gyrAB, pmrAB, phoPQ and kpnEF were identified. The blaLEN gene, rarely described worldwide, was identified in four isolates. The isolates comprised diverse sequence types, the most common being ST152 in 7/42(17%) isolates; clone-specific O and K capsule types were identified. Diverse virulence genes that were not clone-specific were identified in all but one isolate. IncF, IncH and IncI plasmid replicons and two novel integrons were present. The blaCTX-M-15 and blaTEM-1 genes were bracketed by Tn3 transposons, ISEc9, a resolvase and IS91 insertion sequence. There were 20 gene cassettes in 14 different cassette arrays, with the dfrA and aadA gene cassettes being the most frequent. Phylogenetic analysis demonstrated that the isolates were evolutionarily associated with strains from both South Africa and abroad. These findings depict the rich resistome, mobilome and virulome repertoire in clinical K. pneumoniae strains, which are mainly transmitted by clonal, multiclonal and horizontal means in South Africa.
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Affiliation(s)
- Nontombi Marylucy Mbelle
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa.,National Health Laboratory Service, Johannesburg, South Africa
| | - Charles Feldman
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - John Osei Sekyere
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa.
| | | | - Lesedi Modipane
- Department of Medical Microbiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Sabiha Yusuf Essack
- Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu/Natal, Durban, South Africa
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20
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Flerlage T, Brazelton de Cardenas JN, Garner CD, Hasan NA, Karathia H, Qudeimat A, Maron G, Hayden R. Multiple NDM-5-Expressing Escherichia Coli Isolates From an Immunocompromised Pediatric Host. Open Forum Infect Dis 2020; 7:ofaa018. [PMID: 32047833 PMCID: PMC7003983 DOI: 10.1093/ofid/ofaa018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 01/09/2020] [Indexed: 11/17/2022] Open
Abstract
Background Genes conferring carbapenem resistance have disseminated worldwide among Gram-negative bacteria. Here we present longitudinal changes in clinically obtained Escherichia coli isolates from 1 immunocompromised pediatric patient. This report demonstrates potential for antibiotic resistance genes and plasmids to emerge over time in clinical isolates from patients receiving intensive anticancer chemotherapy and broad-spectrum antibiotics. Methods Thirty-three isolates obtained over 7 months from 1 patient were included. Clinical data were abstracted from the medical record. For each isolate, studies included phenotypic antibacterial resistance patterns, sequence typing, bacterial isolate sequencing, plasmid identification, and antibiotic resistance gene identification. Results Sites of isolation included blood, wound culture, and culture for surveillance purposes from the perianal area. Isolates were of 5 sequence types (STs). All were resistant to multiple classes of antibiotics; 23 (69.6%) were phenotypically resistant to all carbapenems. The blaNDM-5 gene was identified in 22 (67%) isolates, all of ST-167 and ST-940, and appeared to coincide with the presence of the IncFII and IncX3 plasmid. Conclusions We present unique microbiologic data from 33 multidrug-resistant E. coli isolates obtained over the course of 7 months from an individual patient in the United States. Two E. coli sequence types causing invasive infection in the same patient and harboring the blaNDM-5 gene, encoded on the IncX3 plasmid and the IncFII plasmid, were identified. This study highlights the emergence of multidrug-resistant bacteria on antibiotic therapy and the necessity of adequate neutrophil number and function in the clearance of bacteremia.
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Affiliation(s)
- Tim Flerlage
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee, USA.,Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | | | - Cherilyn D Garner
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Nur A Hasan
- CosmosID Incorporated, Rockville, Maryland, USA
| | | | - Amr Qudeimat
- Department of Bone Marrow Transplant and Cellular Therapy, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Gabriela Maron
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Randall Hayden
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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21
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Effah CY, Sun T, Liu S, Wu Y. Klebsiella pneumoniae: an increasing threat to public health. Ann Clin Microbiol Antimicrob 2020; 19:1. [PMID: 31918737 PMCID: PMC7050612 DOI: 10.1186/s12941-019-0343-8] [Citation(s) in RCA: 194] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/27/2019] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES This review fills the paucity of information on K. pneumoniae as a nosocomial pathogen by providing pooled data on epidemiological risk factors, resistant trends and profiles and resistant and virulent genes of this organism in Asia. METHODS Exhaustive search was conducted using PubMed, Web of Science, and Google scholar for most studies addressing the prevalence, risk factors, drug resistant-mediated genes and/or virulent factors of K. pneumoniae in Asia. Data extracted for meta-analysis were analyzed using comprehensive meta-analysis version 3. Trends data for the isolation rate and resistance rates were entered into Excel spread sheet and the results were presented in graphs. RESULTS The prevalence rate of drug resistance in K. pneumoniae were; amikacin (40.8%) [95% CI 31.9-50.4], aztreonam (73.3%) [95% CI 59.9-83.4], ceftazidime (75.7%) [95% CI 65.4-83.6], ciprofloxacin (59.8%) [95% CI 48.6-70.1], colistin (2.9%) [95% CI 1.8-4.4], cefotaxime (79.2%) [95% CI 68.0-87.2], cefepime (72.6) [95% CI 57.7-83.8] and imipenem (65.6%) [95% CI 30.8-89.0]. TEM (39.5%) [95% CI 15.4-70.1], SHV-11 (41.8%) [95% CI 16.2-72.6] and KPC-2 (14.6%) [95% CI 6.0-31.4] were some of the resistance mediated genes observed in this study. The most virulent factors utilized by K. pneumoniae are; hypermucoviscous phenotype and mucoviscosity-related genes, genes for biosynthesis of lipopolysaccharide, iron uptake and transport genes and finally, adhesive genes. CONCLUSION It can be concluded that, antimicrobial resistant in K. pneumoniae is a clear and present danger in Asia which needs strong surveillance to curb this menace. It is very important for public healthcare departments to monitor and report changes in antimicrobial-resistant isolates.
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Affiliation(s)
- Clement Yaw Effah
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China
| | - Tongwen Sun
- General ICU, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Zhengzhou, 450052, China
| | - Shaohua Liu
- General ICU, The First Affiliated Hospital of Zhengzhou University, Henan Key Laboratory of Critical Care Medicine, Zhengzhou, 450052, China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou, 450001, China.
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22
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Lee H, Shin J, Chung YJ, Park M, Kang KJ, Baek JY, Shin D, Chung DR, Peck KR, Song JH, Ko KS. Co-introduction of plasmids harbouring the carbapenemase genes, bla NDM-1 and bla OXA-232, increases fitness and virulence of bacterial host. J Biomed Sci 2020; 27:8. [PMID: 31900177 PMCID: PMC6941263 DOI: 10.1186/s12929-019-0603-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 12/19/2019] [Indexed: 01/05/2023] Open
Abstract
Background Bacterial isolates with multiple plasmids harbouring different carbapenemase genes have emerged and been identified repeatedly, despite a general notion that plasmids confer fitness cost in bacterial host. In this study, we investigated the effects of plasmids with carbapenemase genes on the fitness and virulence of bacteria. Methods Different plasmids harbouring the carbapenemase genes, blaNDM-1 and blaOXA-232, were isolated from a carbapenem-resistant K. pneumoniae strain. Each plasmid was conjugated into the Escherichia coli strain DH5α, and a transconjugant with both plasmids was also obtained by transformation. Their in vitro competitive ability, biofilm formation, serum resistance, survival ability within macrophage and fruit fly, and fly killing ability were evaluated. Results The transconjugants with a single plasmid showed identical phenotypes to the plasmid-free strain, except that they decreased fly survival after infection. However, significantly increased fitness, virulence and biofilm production were observed consistently for the transconjugant with both plasmids, harbouring blaNDM-1 and blaOXA-232. Conclusions Our data indicate that bacteria carrying multiple plasmids encoding different carbapenemases may have increased fitness and virulence, emphasizing the need for diverse strategies to combat antimicrobial resistance.
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Affiliation(s)
- Haejeong Lee
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea
| | - Juyoun Shin
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Yeun-Jun Chung
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea.,Precision Medicine Research Center, Integrated Research Center for Genome Polymorphism, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Myungseo Park
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Kyeong Jin Kang
- Department of Anatomy and Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea
| | - Jin Yang Baek
- Asia Pacific Foundation for Infectious Diseases (APFID), Seoul, 06351, Republic of Korea
| | - Dongwoo Shin
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea
| | - Doo Ryeon Chung
- Asia Pacific Foundation for Infectious Diseases (APFID), Seoul, 06351, Republic of Korea.,Division of Infectious Diseases, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06351, Republic of Korea
| | - Kyong Ran Peck
- Division of Infectious Diseases, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, 06351, Republic of Korea
| | - Jae-Hoon Song
- Asia Pacific Foundation for Infectious Diseases (APFID), Seoul, 06351, Republic of Korea
| | - Kwan Soo Ko
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea. .,Asia Pacific Foundation for Infectious Diseases (APFID), Seoul, 06351, Republic of Korea.
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23
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Gu B, Bi R, Cao X, Qian H, Hu R, Ma P. Clonal dissemination of KPC-2-producing Klebsiella pneumoniae ST11 and ST48 clone among multiple departments in a tertiary teaching hospital in Jiangsu Province, China. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:716. [PMID: 32042732 DOI: 10.21037/atm.2019.12.01] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background The world-wide prevalence of carbapenem-resistant Klebsiella pneumoniae (CRKP) poses a threat to the public health. The objective of this study was to determine the epidemiological and molecular patterns of KPC-producing Klebsiella pneumoniae (K. pneumoniae) clinical isolates. Methods In this study, a total of 82 non-duplicated CRKP isolates were analyzed for the prevalence of resistant determinants including carbapenemase, extended spectrum β-lactamase (ESBLs), and AmpC as well as integrons and cassette regions by polymerase chain reaction (PCR) and DNA sequencing. The genetic relatedness was investigated by pulsed field gel electrophoresis (PFGE) and multi-locus sequencing typing (MLST). Results Overall, bla KPC-2 (n=75) was the predominant carbapenemase gene, followed by high prevalence of bla SHV (92.7%) and bla CTX-M (90.2%). PFGE and MLST analysis revealed that 65 out of 68 KPC-2-producing CRKP belonged to the ST11 clone and were distributed mainly in the department of neurology ICU. Moreover, first report on clonal dissemination of KPC-2-producing CRKP ST48 clone and NDM-5-producing CRKP ST337 clone was also identified. Class I integron were detected in 17 (20.7%) of 82 isolates with aadA2 being the most common cassette. And a novel cassette array of integron, aac(6')-II-bla CARB/PSE-1 was identified. Conclusions All in all, KPC-2-producing CRKP ST11 and ST48 clone were widely disseminated in multiple departments of our hospital, which triggers the need for active surveillance and implementation of infection control measures.
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Affiliation(s)
- Bing Gu
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.,Medical Technology Institute of Xuzhou Medical University, Xuzhou 221004, China
| | - Ruru Bi
- Medical Technology Institute of Xuzhou Medical University, Xuzhou 221004, China.,Department of Laboratory Medicine, Suzhou Science and Technology Town Hospital, Suzhou 215163, China
| | - Xiaoli Cao
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Huimin Qian
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Renjing Hu
- Department of Laboratory Medicine, Nanjing Medical University Affiliated Wuxi Second Hospital, Wuxi 214000, China
| | - Ping Ma
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.,Medical Technology Institute of Xuzhou Medical University, Xuzhou 221004, China
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24
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Kopotsa K, Osei Sekyere J, Mbelle NM. Plasmid evolution in carbapenemase-producing Enterobacteriaceae: a review. Ann N Y Acad Sci 2019; 1457:61-91. [PMID: 31469443 DOI: 10.1111/nyas.14223] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/22/2019] [Accepted: 07/26/2019] [Indexed: 12/17/2022]
Abstract
Carbapenem-resistant Enterobacteriaceae (CRE) have been listed by the WHO as high-priority pathogens owing to their high association with mortalities and morbidities. Resistance to multiple β-lactams complicates effective clinical management of CRE infections. Using plasmid typing methods, a wide distribution of plasmid replicon groups has been reported in CREs around the world, including IncF, N, X, A/C, L/M, R, P, H, I, and W. We performed a literature search for English research papers, published between 2013 and 2018, reporting on plasmid-mediated carbapenem resistance. A rise in both carbapenemase types and associated plasmid replicon groups was seen, with China, Canada, and the United States recording a higher increase than other countries. blaKPC was the most prevalent, except in Angola and the Czech Republic, where OXA-181 (n = 50, 88%) and OXA-48-like (n = 24, 44%) carbapenemases were most prevalent, respectively; blaKPC-2/3 accounted for 70% (n = 956) of all reported carbapenemases. IncF plasmids were found to be responsible for disseminating different antibiotic resistance genes worldwide, accounting for almost 40% (n = 254) of plasmid-borne carbapenemases. blaCTX-M , blaTEM , blaSHV , blaOXA-1/9 , qnr, and aac-(6')-lb were mostly detected concurrently with carbapenemases. Most reported plasmids were conjugative but not present in multiple countries or species, suggesting limited interspecies and interboundary transmission of a common plasmid. A major limitation to effective characterization of plasmid evolution was the use of PCR-based instead of whole-plasmid sequencing-based plasmid typing.
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Affiliation(s)
- Katlego Kopotsa
- Department of Medical Microbiology, Faculty of Health Sciences, School of Medicine, University of Pretoria, Pretoria, Gauteng, South Africa
| | - John Osei Sekyere
- Department of Medical Microbiology, Faculty of Health Sciences, School of Medicine, University of Pretoria, Pretoria, Gauteng, South Africa
| | - Nontombi Marylucy Mbelle
- Department of Medical Microbiology, Faculty of Health Sciences, School of Medicine, University of Pretoria, Pretoria, Gauteng, South Africa.,National Health Laboratory Service, Tshwane Division, Department of Medical Microbiology, University of Pretoria, Pretoria, Gauteng, South Africa
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25
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Abstract
Hypervirulent K. pneumoniae (hvKp) is an evolving pathotype that is more virulent than classical K. pneumoniae (cKp). hvKp usually infects individuals from the community, who are often healthy. Infections are more common in the Asian Pacific Rim but are occurring globally. hvKp infection frequently presents at multiple sites or subsequently metastatically spreads, often requiring source control. hvKp has an increased ability to cause central nervous system infection and endophthalmitis, which require rapid recognition and site-specific treatment. The genetic factors that confer hvKp's hypervirulent phenotype are present on a large virulence plasmid and perhaps integrative conjugal elements. Increased capsule production and aerobactin production are established hvKp-specific virulence factors. Similar to cKp, hvKp strains are becoming increasingly resistant to antimicrobials via acquisition of mobile elements carrying resistance determinants, and new hvKp strains emerge when extensively drug-resistant cKp strains acquire hvKp-specific virulence determinants, resulting in nosocomial infection. Presently, clinical laboratories are unable to differentiate cKp from hvKp, but recently, several biomarkers and quantitative siderophore production have been shown to accurately predict hvKp strains, which could lead to the development of a diagnostic test for use by clinical laboratories for optimal patient care and for use in epidemiologic surveillance and research studies.
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Affiliation(s)
- Thomas A Russo
- Department of Medicine, University at Buffalo-State University of New York, Buffalo, New York, USA
- Department of Microbiology and Immunology, University at Buffalo-State University of New York, Buffalo, New York, USA
- The Witebsky Center for Microbial Pathogenesis, University at Buffalo-State University of New York, Buffalo, New York, USA
- The Veterans Administration Western New York Healthcare System, Buffalo, New York, USA
| | - Candace M Marr
- Department of Medicine, University at Buffalo-State University of New York, Buffalo, New York, USA
- Erie County Medical Center, Buffalo, New York, USA
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26
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Long D, Zhu LL, Du FL, Xiang TX, Wan LG, Wei DD, Zhang W, Liu Y. Phenotypical profile and global transcriptomic profile of Hypervirulent Klebsiella pneumoniae due to carbapenemase-encoding plasmid acquisition. BMC Genomics 2019; 20:480. [PMID: 31185888 PMCID: PMC6558890 DOI: 10.1186/s12864-019-5705-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 04/16/2019] [Indexed: 12/13/2022] Open
Abstract
Background Plasmids play an vital role in driving the rapid global spread of antimicrobial resistance and adaptation to changing ambient conditions. It has been suggested that the presence of plasmids can pose tremendous impacts on the host physiology. However, little is known regarding the contributions of carbapenemase-encoding plasmid carriage on the physiology and pathogenicity of hypervirulent K. pneumoniae (hvKP). Results Here we performed a transcriptomic analysis of hvKP with or without carbapenemase-encoding plasmid p24835-NDM5. The results had shown 683 genes with differential expression (false discovery rate, ≤0.001; > 2-fold change), of which 107 were up-regulated and 576 were down-regulated. Gene groups with functions relating to carbohydrate metabolism and multidrug efflux system were increased in genes with increased expression, and those relating to capsule biosynthesis and virulence factors were increased in the genes with decreased expression. In agreement with these changes, survival rate of TfpNDM-hvKP in the presence of normal human serum decreased, and competitive index (CI values) indicated significant fitness defects in the plasmid-carrying hvKP strain when co-cultured with its plasmid-free isogenic ancestor and the ATCC control. Moreover, the p24835-NDM5-containing hvKP strain retained its high neutrophil-mediated phagocytosis and murine lethality. Conclusion These data indicate that hvKP responds to carbapenemase-encoding plasmid by altering the expression of genes involved in carbohydrate metabolism, antibiotic resistance, capsule biosynthesis and virulence expression. Apart from antibiotic resistance selective advantages, carbapenemase-encoding plasmid carriage may also lead to virulence change or adaption to specific habitats in hvKP strain. Electronic supplementary material The online version of this article (10.1186/s12864-019-5705-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dan Long
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Lan-Lan Zhu
- Department of Respiratory, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Fang-Ling Du
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Tian-Xin Xiang
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - La-Gen Wan
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Dan-Dan Wei
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Wei Zhang
- Department of Respiratory, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China
| | - Yang Liu
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Yong wai zheng jie No. 17, Nanchang, 330006, People's Republic of China.
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27
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Liu Y, Du FL, Xiang TX, Wan LG, Wei DD, Cao XW, Zhang W. High Prevalence of Plasmid-Mediated Quinolone Resistance Determinants Among Serotype K1 Hypervirulent Klebsiella pneumoniae Isolates in China. Microb Drug Resist 2019; 25:681-689. [PMID: 30615560 DOI: 10.1089/mdr.2018.0173] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Yang Liu
- Department of Bacteriology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Fang-ling Du
- Department of Bacteriology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Tian-xin Xiang
- Department of Infectious Disease, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - La-Gen Wan
- Department of Bacteriology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Dan-dan Wei
- Department of Bacteriology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Xian-Wei Cao
- Department of Hospital Infection Control, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, P.R. China
| | - Wei Zhang
- Department of Respiration, The First Affiliated Hospital of Nanchang University, Nanchang, P.R. China
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Liu BT, Su WQ. Whole genome sequencing of NDM-1-producing serotype K1 ST23 hypervirulent Klebsiella pneumoniae in China. J Med Microbiol 2019; 68:866-873. [PMID: 31107201 DOI: 10.1099/jmm.0.000996] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
PURPOSE The emergence and spread of carbapenem-resistant hypervirulent Klebsiella pneumoniae (CR-hvKP) is causing worldwide concern, whereas NDM-producing hvKP is still rare. Here we report the complete genome sequence characteristics of an NDM-1-producing ST23 type clinical hvKP in PR China. METHODOLOGY Capsular polysaccharide serotyping was performed by PCR. The complete genome sequence of isolate 3214 was obtained using both the Illumina Hiseq platform and Pacbio RS platform. Multilocus sequence type was identified by submitting the genome sequence to mlst 2.0 and the antimicrobial resistance genes and plasmid replicons were identified using ResFinder and PlasmidFinder, respectively. Transferability of the blaNDM-1-bearing plasmid was determined by conjugation experiment, S1 pulsed-field gel electrophoresis and Southern hybridization. RESULTS Isolate 3214 was classified to ST23 and belonged to the K1 capsular serotype. The isolate's total genome size was 6 171 644 bp with a G+C content of 56.39 %, consisting of a 5 448 209 bp chromosome and seven plasmids. The resistome included 18 types of antibiotic resistance genes. Fourteen resistance genes including blaNDM-1 and blaCTX-M-14 were located on plasmids and five also including blaCTX-M-14 were in the chromosome. Plasmid pNDM_3214 carrying blaNDM-1 harboured six types of resistance genes surrounded by insertion sequences and was conjugative. The worldwide pLVPK-like virulence plasmid harbouring rmpA2 and rmpA was also found in this isolate. CONCLUSION This study provides basic information of phenotypic and genomic features of ST23 CR-hvKP isolate 3214. Our data highlights the potential risk of spread of NDM-1-producing ST23 hvKP.
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Affiliation(s)
- Bao-Tao Liu
- 1 College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, PR China
| | - Wei-Qi Su
- 2 Qingdao Municipal Hospital, Qingdao, PR China
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Caneiras C, Lito L, Melo-Cristino J, Duarte A. Community- and Hospital-Acquired Klebsiella pneumoniae Urinary Tract Infections in Portugal: Virulence and Antibiotic Resistance. Microorganisms 2019; 7:microorganisms7050138. [PMID: 31100810 PMCID: PMC6560439 DOI: 10.3390/microorganisms7050138] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/30/2019] [Accepted: 05/15/2019] [Indexed: 11/23/2022] Open
Abstract
Klebsiella pneumoniae is a clinically relevant pathogen and a frequent cause of hospital-acquired (HA) and community-acquired (CA) urinary tract infections (UTI). The increased resistance of this pathogen is leading to limited therapeutic options. To investigate the epidemiology, virulence, and antibiotic resistance profile of K. pneumoniae in urinary tract infections, we conducted a multicenter retrospective study for a total of 81 isolates (50 CA-UTI and 31 HA-UTI) in Portugal. The detection and characterization of resistance and virulence determinants were performed by molecular methods (PCR, PCR-based replicon typing, and multilocus sequence typing (MLST)). Out of 50 CA-UTI isolates, six (12.0%) carried β-lactamase enzymes, namely blaTEM-156 (n = 2), blaTEM-24 (n = 1), blaSHV-11 (n = 1), blaSHV-33 (n = 1), and blaCTX-M-15 (n = 1). All HA-UTI were extended-spectrum β-lactamase (ESBL) producers and had a multidrug resistant profile as compared to the CA-UTI isolates, which were mainly resistant to ciprofloxacin, levofloxacin, tigecycline, and fosfomycin. In conclusion, in contrast to community-acquired isolates, there is an overlap between virulence and multidrug resistance for hospital-acquired UTI K. pneumoniae pathogens. The study is the first to report different virulence characteristics for hospital and community K. pneumoniae pathogens, despite the production of β-lactamase and even with the presence of CTX-M-15 ESBL, a successful international ST15 clone, which were identified in both settings. This highlights that a focus on genomic surveillance should remain a priority in the hospital environment.
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Affiliation(s)
- Cátia Caneiras
- Microbiology and Immunology Department, Interdisciplinary Research Centre Egas Moniz (CiiEM), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal.
- Institute of Environmental Health (ISAMB), Faculty of Medicine, Universidade de Lisboa, 1649-028 Lisboa, Portugal.
| | - Luis Lito
- Laboratory of Microbiology, Centro Hospitalar Lisboa Norte, 1649-035 Lisboa, Portugal.
| | - José Melo-Cristino
- Laboratory of Microbiology, Centro Hospitalar Lisboa Norte, 1649-035 Lisboa, Portugal.
- Institute of Microbiology, Institute of Molecular Medicine, Faculty of Medicine, Universidade de Lisboa,1649-028 Lisboa, Portugal.
| | - Aida Duarte
- Microbiology and Immunology Department, Interdisciplinary Research Centre Egas Moniz (CiiEM), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal.
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Whole Genome Sequencing of Extended Spectrum β-lactamase (ESBL)-producing Klebsiella pneumoniae Isolated from Hospitalized Patients in KwaZulu-Natal, South Africa. Sci Rep 2019; 9:6266. [PMID: 31000772 PMCID: PMC6472517 DOI: 10.1038/s41598-019-42672-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 04/02/2019] [Indexed: 01/26/2023] Open
Abstract
Extended spectrum β-lactamase (ESBL)-producing Klebsiella pneumoniae remain a critical clinical concern worldwide. The aim of this study was to characterize ESBL-producing K. pneumoniae detected within and between two hospitals in uMgungundlovu district, South Africa, using whole genome sequencing (WGS). An observational period prevalence study on antibiotic-resistant ESKAPE (i.e. Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp.) bacteria was carried out in hospitalized patients during a two-month period in 2017. Rectal swabs and clinical specimens were collected from patients hospitalized and were screened for ESBL-producing, Gram-negative ESKAPE bacteria using cefotaxime-containing MacConkey agar and ESBL combination disk tests. Nine confirmed ESBL-K. pneumoniae isolated from six patients and two hospitals were whole genome sequenced using an Illumina MiSeq platform. Genome sequences were screened for presence of integrons, insertion sequences, plasmid replicons, CRISPR regions, resistance genes and virulence genes using different software tools. Of the 159 resistant Gram-negative isolates collected, 31 (19.50%) were ESBL-producers, of which, nine (29.03%) were ESBL-K. pneumoniae. The nine K. pneumoniae isolates harboured several β-lactamase genes, including blaCTX-M-15, blaTEM-1b, blaSHV-1, blaOXA-1 concomitantly with many other resistance genes e.g. acc(6')-lb-cr, aadAI6, oqxA and oqxB that confer resistance to aminoglycosides and/or fluoroquinolones, respectively. Three replicon plasmid types were detected in both clinical and carriage isolates, namely ColRNAI, IncFIB(K), IncF(II). Sequence type ST152 was confirmed in two patients (one carriage isolate detected on admission and one isolate implicated in infection) in one hospital. In contrast, ST983 was confirmed in a clinical and a carriage isolate of two patients in two different hospitals. Our data indicate introduction of ESBL-producing K. pneumoniae isolates into hospitals from the community. We also found evidence of nosocomial transmission within a hospital and transmission between different hospitals. The Clustered Regularly Interspaced Palindromic Repeats (CRISPR)-associated cas3 genes were further detected in two of the nine ESBL-KP isolates. This study showed that both district and tertiary hospital in uMgungundlovu District were reservoirs for several resistance determinants and highlighted the necessity to efficiently and routinely screen patients, particularly those receiving extensive antibiotic treatment and long-term hospitalization stay. It also reinforced the importance of infection, prevention and control measures to reduce the dissemination of antibiotic resistance within the hospital referral system in this district.
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Liu Y, Zhang H, Zhang X, Jiang N, Zhang Z, Zhang J, Zhu B, Wang G, Zhao K, Zhou Y. Characterization of an NDM-19-producing Klebsiella pneumoniae strain harboring 2 resistance plasmids from China. Diagn Microbiol Infect Dis 2019; 93:355-361. [DOI: 10.1016/j.diagmicrobio.2018.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 11/06/2018] [Accepted: 11/13/2018] [Indexed: 02/07/2023]
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Xu M, Fu Y, Fang Y, Xu H, Kong H, Liu Y, Chen Y, Li L. High prevalence of KPC-2-producing hypervirulent Klebsiella pneumoniae causing meningitis in Eastern China. Infect Drug Resist 2019; 12:641-653. [PMID: 30936727 PMCID: PMC6430001 DOI: 10.2147/idr.s191892] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Klebsiella pneumoniae has been the leading causative pathogen for adult bacterial meningitis in several Asian countries. The clinical and microbiological characteristics of K. pneumoniae meningitis in mainland China are still unknown. MATERIALS AND METHODS The clinical data of patients with K. pneumoniae meningitis from January 2011 to July 2017 in a tertiary hospital were retrospectively evaluated. The isolates were tested for antibiotic-resistance genes, virulence-associated genes, and molecular subtypes. Hyper-virulent K. pneumoniae (hvKP) was defined as the presence of pLVPK-like virulence plasmid. RESULTS During the study period, a total of 48 patients with meningitis caused by K. pneumoniae were identified, accounting for 21.2% (48/226) of Gram-negative bacilli meningitis. Of the 44 available isolates, 65.9% (29/44) were carbapenem resistant, and all except one har-bored bla KPC-2. K64 was the most common serotype (n=13), followed by K47 (n=11) and K1 (n=5). The pLVPK-related genetic loci were found in about half of isolates (iutA: 56.8%, iucA: 56.8%, rmpA2:50.0%, rmpA: 43.2%, and iroN: 40.9%). Twenty-two strains carrying pLVPK-derived virulence plasmid were defined as hvKP. Notably, the coexistence of bla KPC-2-encoding plasmid and the pLVPK-derived virulence plasmid was detected in 15 strains (34.1%, 15/44), suggesting K. pneumoniae carbapenemase-2 (KPC-2)-producing hvKP. The proportion of KPC-2-producing hvKP by year increased remarkably from 0% (2011) to 71.4% (2017). Of the 15 KPC-2-producing hvKP strains, 80.0% (12/15) were assigned to sequence type 11 and 2 strains (13.3%) belonged to clonal complex 23. Most of the patients infected with KPC-2-producing hvKP had preceding postneurosurgical state (93.3%, 14/15) and severe pneumonia (73.3%, 11/15). All the cases (100%, 15/15) had fatal outcome. CONCLUSION The high prevalence and mortality of K. pneumoniae, especially KPC-2-producing hvKP meningitis, in China should be of concern. The implementation of epidemiological surveillance and identification of an effective clinical treatment are paramount.
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Affiliation(s)
- Min Xu
- Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province, Center of Clinical Laboratory, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yiqi Fu
- Department of Respiratory Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yunhui Fang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
| | - Hao Xu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
| | - Haishen Kong
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
| | - Yanchao Liu
- Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province, Center of Clinical Laboratory, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yu Chen
- Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province, Center of Clinical Laboratory, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
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Liu Y, Long D, Xiang TX, Du FL, Wei DD, Wan LG, Deng Q, Cao XW, Zhang W. Whole genome assembly and functional portrait of hypervirulent extensively drug-resistant NDM-1 and KPC-2 co-producing Klebsiella pneumoniae of capsular serotype K2 and ST86. J Antimicrob Chemother 2019; 74:1233-1240. [PMID: 30843067 DOI: 10.1093/jac/dkz023] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 12/12/2018] [Accepted: 01/08/2019] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yang Liu
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Dan Long
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Tian-Xin Xiang
- Department of Infectious Disease, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Fang-Ling Du
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Dan Dan Wei
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - La-Gen Wan
- Department of Clinical Microbiology, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Qiong Deng
- Department of Hospital Infection Control, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Xian-Wei Cao
- Department of Hospital Infection Control, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
| | - Wei Zhang
- Department of Respiration, First Affiliated Hospital of Nanchang University, Nanchang University, Nanchang, PR China
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Liu Z, Gu Y, Li X, Liu Y, Ye Y, Guan S, Li J. Identification and Characterization of NDM-1-producing Hypervirulent (Hypermucoviscous) Klebsiella pneumoniae in China. Ann Lab Med 2019; 39:167-175. [PMID: 30430779 PMCID: PMC6240523 DOI: 10.3343/alm.2019.39.2.167] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Revised: 07/28/2018] [Accepted: 10/25/2018] [Indexed: 12/28/2022] Open
Abstract
Background Carbapenem-resistant hypervirulent (hypermucoviscous) Klebsiella pneumoniae (CR-HMKP) poses a significant public health challenge. We investigated its epidemiology and molecular characteristics in a tertiary care hospital in eastern China. Methods CR-HMKP were identified among 106 non-duplicated carbapenem-resistant K. pneumoniae isolates (from June 2013 to September 2017) using the string test. The pulsotype (PT) and sequence type (ST) of CR-HMKP isolates were determined using pulsed-field gel electrophoresis and multilocus sequence typing. Resistance determinants, capsular serotypes, and virulence genes were detected by PCR and sequencing. Representative isolates from each PT were selected, and their virulence phenotypes were established using the serum killing and Galleria mellonella lethality assays. Results Of the 106 isolates, 13 (12.3%) were CR-HMKP. Seven were positive for blaNDM-1 and shared the same genotype (PT5/ST1764); the others were positive for blaKPC-2, belonged to ST11, and were divided into four different PTs. The serotype of all blaNDM-1-positive isolates was K64, while that of blaKPC-2-positive isolates were K47 (N=4) and K64 (N=2). The NDM-1-producing HMKP isolates were positive for aerobactin, exhibited high serum resistance, and elicited significantly increased larval mortality compared with the other isolates. All patients had received invasive treatment prior to infection by NDM-1-producing HMKP. The infections occurred between July and August 2016 and were hospital-acquired. Conclusions NDM-1-producing HMKP ST1764 isolates were identified; this is the first report worldwide on an outbreak of nosocomial infection caused by these isolates. Effective surveillance and strict infection control strategies should be implemented to prevent CR-HMKP dissemination.
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Affiliation(s)
- Zhou Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Department of Laboratory Medicine, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yi Gu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Xin Li
- Department of Laboratory Medicine, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yanyan Liu
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui, China
| | - Ying Ye
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui, China
| | - Shihe Guan
- Department of Laboratory Medicine, The Second Hospital of Anhui Medical University, Hefei, Anhui, China.
| | - Jiabin Li
- Department of Infectious Diseases, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui, China.,Department of Infectious Diseases, Chaohu Hospital of Anhui Medical University, Hefei, Anhui, China.
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35
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Fu Y, Xu M, Liu Y, Li A, Zhou J. Virulence and genomic features of a bla CTX-M-3 and bla CTX-M-14 coharboring hypermucoviscous Klebsiella pneumoniae of serotype K2 and ST65. Infect Drug Resist 2019; 12:145-159. [PMID: 30655681 PMCID: PMC6322562 DOI: 10.2147/idr.s187289] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background Capsular serotype K2 Klebsiella pneumoniae of sequence type (ST) 65 has been recognized as a hypervirulent clone. Simultaneous presence of different blaCTX-M genes has never been reported in this clone. In the present study, the genetic characteristics and virulence phenotype of a CTX-M-3 and CTX-M-14 coproducing ST65 K. pneumoniae human isolate, KP_06, that caused an intracranial infection, are evaluated. Methods The potential virulence of KP_06 was assayed by in vitro and in vivo methods. The molecular biology and whole-genome sequencing technology were used to analyze the genomic features associated with the virulence of this strain. Results The KP_06 exhibited typical features of hypervirulent K. pneumoniae (hvKP), showing hypermucoviscosity phenotype and belonging to K2 and ST65. Apart from virulence genes linked to hvKP, including rmpA, rmpA2, and clb cluster and genes encoding siderophores, it was found to harbor a ~170 kb pLVPK-like virulence plasmid. In contrast to most hvKP, KP_06 was resistant to cephalosporins and the coexistence of blaCTX-M-3 and blaCTX-M-14 was detected. Further experiments demonstrated that this strain was classified as a nonbiofilm producer and serum sensitivity (grade 1) and killed only 30% of Galleria mellonella inoculated with 1×106 colony-forming unit of the specimen within 48 hours, suggesting relatively low virulence. Comparative genomic analysis of KP_06 with five K2 hypermucoviscous K. pneumoniae (HMKP) revealed seven unique orthologies with varied function in this strain. Intriguingly, the virulence genes identified in KP-06 were unexpectedly more diverse than those observed in five other K2 HMKP strains. Conclusion Our data support the notion that neither virulence-associated genes (clusters) nor the pLVPK-like virulence plasmid is sufficient for the hypervirulence of K. pneumoniae. Future studies aiming to explore the virulence of K. pneumoniae should take genome-based profile together with experimental work. The detailed mechanism involving in the impaired virulence of KP_06 remains to be further explored.
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Affiliation(s)
- Yiqi Fu
- Department of Respiratory Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
| | - Min Xu
- Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province, Center of Clinical Laboratory, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yanchao Liu
- Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province, Center of Clinical Laboratory, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Ang Li
- Department of Precision Medicine Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Jianying Zhou
- Department of Respiratory Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China,
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36
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Marr CM, Russo TA. Hypervirulent Klebsiella pneumoniae: a new public health threat. Expert Rev Anti Infect Ther 2018; 17:71-73. [PMID: 30501374 DOI: 10.1080/14787210.2019.1555470] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Candace M Marr
- a Department of Medicine , University at Buffalo-State University of New York , Buffalo , NY , USA.,b Department of Medicine , Erie County Medical Center , Buffalo , NY , USA
| | - Thomas A Russo
- a Department of Medicine , University at Buffalo-State University of New York , Buffalo , NY , USA.,c Microbiology and Immunology , University at Buffalo-State University of New York , Buffalo , NY , USA.,d The Witebsky Center for Microbial Pathogenesis , University at Buffalo-State University of New York , Buffalo , NY , USA.,e Department of Medicine , The Veterans Administration Western New York Healthcare System , Buffalo , NY , USA
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37
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Bi R, Kong Z, Qian H, Jiang F, Kang H, Gu B, Ma P. High Prevalence of bla NDM Variants Among Carbapenem-Resistant Escherichia coli in Northern Jiangsu Province, China. Front Microbiol 2018; 9:2704. [PMID: 30483231 PMCID: PMC6243109 DOI: 10.3389/fmicb.2018.02704] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/23/2018] [Indexed: 12/31/2022] Open
Abstract
The continuous emergence of carbapenem-resistant Escherichia coli (CRECO) presents a great challenge to public health. New Delhi metallo-lactamase (NDM) variants are widely disseminated in China, so the research on the prevalence and transmission of diverse blaNDM variants is urgently needed. In the present study, 54 CRECO isolates were collected from 1,185 Escherichia coli isolates in five hospitals in Northern Jiangsu Province, China from September 2015 to August 2016. Antimicrobial susceptibility tests, PCR detection of resistance determinants, multi-locus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE) were performed to characterize these strains. Plasmid conjugation experiments were carried out to determine the transferability of resistant genes from selected isolates. PCR-based replicon typing (PBRT), S1 nuclease-PFGE, and Southern blotting were conducted for plasmid profiling. Carbapenemase genes were detectable in all CRECO isolates, among which thirty-one CRECO isolates were found to carry blaNDM−5 (54.7%), while, blaNDM−1, blaNDM−7, blaNDM−4, blaNDM−9, and blaKPC−2 were identified in 14, five, two, one, and one isolates, respectively. MLST results revealed 15 different STs and four new STs were first reported to be linked with NDM-producing isolates. PFGE typing showed that no more than two isolates with the same ST appeared to the same band pattern except three ST410 isolates. Twenty-six selected NDM-producing isolates were successfully transferred to E. coli J53 by conjugation experiments. Notably, 50.0% (13/26) of blaNDM variants were found to be carried by ~55 kb IncX3 plasmid. Our study reported a high prevalence of blaNDM variants, especially blaNDM−5, in Northern Jiangsu province, China. Diverse blaNDM variants were mainly carried by ~55 kb IncX3 plasmids, suggesting that the fast evolution and high transferability of this kind of plasmid promote the high prevalence of blaNDM variants. Therefore, large-scale surveillance and effective infection control measures are also urgently needed to prevent diverse blaNDM variants from becoming epidemic in the future.
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Affiliation(s)
- Ruru Bi
- Medical Technology School, Xuzhou Medical University, Xuzhou, China
| | - Ziyan Kong
- Medical Technology School, Xuzhou Medical University, Xuzhou, China
| | - Huimin Qian
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
| | - Fei Jiang
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Haiquan Kang
- Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Bing Gu
- Medical Technology School, Xuzhou Medical University, Xuzhou, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Ping Ma
- Medical Technology School, Xuzhou Medical University, Xuzhou, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
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Zhou Y, Wang X, Shen J, Lu Z, Liu Y. Endogenous Endophthalmitis Caused by Carbapenem-Resistant Hypervirulent Klebsiella Pneumoniae: A Case Report and Literature Review. Ocul Immunol Inflamm 2018; 27:1099-1104. [PMID: 30230939 DOI: 10.1080/09273948.2018.1502786] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Purpose: To report a rare case of endogenous endophthalmitis caused by carbapenem-resistant hypervirulent Klebsiella pneumoniae (CR-hvKP). Methods: A retrospective chart review was conducted. The isolates were characterized by hypermucoviscosity, resistance genes, virulence genes, and multilocus sequence typing. Results: A 47-year-old diabetic woman acquired carbapenem-resistant K. pneumoniae (CRKP) nosocomial pneumonia. Metastatic endophthalmitis occurred in the right eye a week after the occurrence of CRKP bloodstream infection (BSI). Visual acuity decreased to light perception within 3 days. Although vitrectomy relieved ocular pain, endophthalmitis deteriorated due to uncontrollable BSI, and developed to corneal perforation. The strains isolated from bronchoalveolar lavage fluid, blood, and intraocular pus originated from the same clone. The pathogen was hypermucoviscous, belonged to sequence type 11, harbored resistance genes blaKPC-2, blaTEM, blaSHV, rmtB, and virulence genes rmpA2, iucABCD, iroBCD. Conclusions: Endogenous endophthalmitis caused by CR-hvKP has emerged, which is a treatment challenge for both ophthalmologists and physicians.
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Affiliation(s)
- Yun Zhou
- Department of Intensive Care Unit, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Xing Wang
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine , Shanghai , P. R. China
| | - Jun Shen
- Department of Intensive Care Unit, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Zhaozeng Lu
- Department of Ophthalmology, Huashan Hospital, Fudan University , Shanghai , P. R. China
| | - Yang Liu
- Institute of Antibiotics, Huashan Hospital, Fudan University , Shanghai , P. R. China.,China Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health , Shanghai , P. R. China
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Antochevis LC, Magagnin CM, Nunes AG, Goulart TM, Martins AS, Cayô R, Gales AC, Barth AL, Zavascki AP. KPC-producing Klebsiella pneumoniae bloodstream isolates from Brazilian hospitals: What (still) remains active? J Glob Antimicrob Resist 2018; 15:173-177. [PMID: 30071353 DOI: 10.1016/j.jgar.2018.07.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/07/2018] [Accepted: 07/18/2018] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVES This study assessed susceptibility to polymyxin B (PMB) and alternative antimicrobials, with focus on aminoglycosides and tigecycline, according to different breakpoints in KPC-producing Klebsiella pneumoniae (KPC-Kp) bloodstream isolates from Brazilian hospitals. METHODS Bloodstream K. pneumoniae isolates non-susceptible to any of the three carbapenems (meropenem, imipenem or ertapenem) from four Brazilian tertiary-care hospitals were selected. Antimicrobial susceptibility was determined and interpreted according to distinct breakpoints. Twenty-nine PMB-resistant KPC-Kp isolates were selected for molecular typing. RESULTS A total of 158 KPC-Kp were analysed. MIC50/90 values for PMB were 0.25/16mg/L; 40 isolates (25.3%) were resistant to PMB. MIC50/90 values for meropenem were 32/≥256mg/L; no isolates were susceptible to meropenem according to CLSI, but 10 isolates were intermediate using EUCAST breakpoints (1, MIC=4mg/L; 9, MIC=8mg/L). MIC50/90 values for tigecycline were 2/8mg/L; 53 (33.5%) and 94 (59.5%) isolates were susceptible according to EUCAST and FDA breakpoints, respectively. MIC50/90 values were 32/≥64mg/L for amikacin and ≥16/≥16mg/L for gentamicin; 48 (30.4%), 28 (17.7%) and 16 (10.1%) were susceptible to amikacin according to CLSI, EUCAST and USCAST, respectively, but susceptibility rates to gentamicin were <7.0%. Eighteen distinct clonal profiles were identified among 29 PMB-resistant isolates by DNA macrorestriction. Most clones belonged to CC11. CONCLUSION Elevated rates of PMB-resistant KPC-Kp bloodstream infections were found in four Brazilian hospitals, mostly of polyclonal origin. Alternative antimicrobials with the highest in vitro activity were tigecycline and amikacin, although susceptibility rates significantly decreased using criteria with stricter breakpoints (e.g. EUCAST, USCAST).
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Affiliation(s)
- Laura C Antochevis
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Laboratório Weinmann-Grupo Fleury, Porto Alegre, Brazil
| | - Cibele M Magagnin
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Laboratório Weinmann-Grupo Fleury, Porto Alegre, Brazil
| | - Aline G Nunes
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Taíse M Goulart
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Amanda S Martins
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Rodrigo Cayô
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ana C Gales
- Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina/Universidade Federal de São Paulo, São Paulo, Brazil
| | - Afonso L Barth
- Laboratório de Pesquisa em Resistência Bacteriana (LABRESIS), Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Alexandre P Zavascki
- Department of Internal Medicine, Medical School, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Infectious Diseases Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Infectious Diseases Service, Hospital Moinhos de Vento, Porto Alegre, Brazil.
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