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Ilham D, Souad L, Asmae LH, Kawtar N, Mohammed T, Nabila S. Prevalence, antibiotic resistance profile, MBLs encoding genes, and biofilm formation among clinical carbapenem-resistant Enterobacterales isolated from patients in Mohammed VI University Hospital Centre, Morocco. Lett Appl Microbiol 2023; 76:ovad107. [PMID: 37699792 DOI: 10.1093/lambio/ovad107] [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: 03/22/2023] [Revised: 08/31/2023] [Accepted: 09/11/2023] [Indexed: 09/14/2023]
Abstract
Enterobacterales are frequently a major cause of human infections. The emergence of carbapenem resistance as well as the biofilm formation complicate their management. In this regard, this study aimed to investigate the prevalence, antibiogram, carbapenemase genes, and biofilm production among Enterobacterales. For this purpose, 18 172 clinical specimens from hospitalized patients at Mohammed VI University Hospital were collected over two years (2018-2019). The bacteriological investigation was performed to isolate Enterobacterales. Subsequently, BD-Phoenix and MALDI-TOF-MS were used for bacterial identification. The production of ESBLs and carbapenemases was assessed using phenotypic tests and PCR. The biofilm formation was eventually carried out. Out of 195 carbapenem-resistant Enterobacterales strains, 190 were carbapenemase producers, and 74 Enterobacterales produced metallo-beta-lactamases (MBLs). The PCR results revealed that blaNDM was the most common carbapenemase gene, present in 62 cases, followed by the co-existence of blaNDM and blaOXA-48 in 12 cases. Klebsiella pneumoniae was the most frequently identified species among the 74 New Delhi metallo-β-lactamase (NDM) isolates and the XDR resistance phenotype was the most prevalent with 58.10%. Additionally, all 74 NDM-positive Enterobacterales were able to form biofilms, with 82.4% being strong producers. This study highlights the need for rapid detection of carbapenemase and biofilm production in our hospital to manage this health concern.
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Affiliation(s)
- Dilagui Ilham
- Laboratoire de Lutte Contre les Maladies Infectieuses, Faculty of Medicine and Pharmacy, University Cadi Ayyad, Marrakesh 40000, Morocco
- Laboratory of Microbiology-Virology of Ar-Razi Hospital, Mohammed VI University Hospital Centre, BP 2360, Marrakesh, Morocco
| | - Loqman Souad
- Laboratoire de Lutte Contre les Maladies Infectieuses, Faculty of Medicine and Pharmacy, University Cadi Ayyad, Marrakesh 40000, Morocco
- Laboratory of Microbiology-Virology of Ar-Razi Hospital, Mohammed VI University Hospital Centre, BP 2360, Marrakesh, Morocco
| | - Lamrani Hanchi Asmae
- Laboratoire de Lutte Contre les Maladies Infectieuses, Faculty of Medicine and Pharmacy, University Cadi Ayyad, Marrakesh 40000, Morocco
- Laboratory of Microbiology-Virology of Ar-Razi Hospital, Mohammed VI University Hospital Centre, BP 2360, Marrakesh, Morocco
| | - Nayme Kawtar
- Laboratory of Molecular Bacteriology, Pasteur Institute, Casablanca 20250, Morocco
| | - Timinouni Mohammed
- Laboratory of Molecular Bacteriology, Pasteur Institute, Casablanca 20250, Morocco
| | - Soraa Nabila
- Laboratoire de Lutte Contre les Maladies Infectieuses, Faculty of Medicine and Pharmacy, University Cadi Ayyad, Marrakesh 40000, Morocco
- Laboratory of Microbiology-Virology of Ar-Razi Hospital, Mohammed VI University Hospital Centre, BP 2360, Marrakesh, Morocco
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Zhao M, He J, Zhang R, Feng J, Deng Y, Zhang J. Epidemiological characteristics of New Delhi Metallo-β-Lactamase-producing Enterobacteriaceae in the Fourth hospital of Hebei Medical University. BMC Infect Dis 2023; 23:298. [PMID: 37147576 PMCID: PMC10163796 DOI: 10.1186/s12879-023-08242-8] [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: 01/23/2023] [Accepted: 04/11/2023] [Indexed: 05/07/2023] Open
Abstract
The epidemiological characteristics of New Delhi Metallo-β-Lactamase-Producing (NDM) Enterobacteriaceae were analyzed to provide theoretical support for clarifying the distribution characteristics of carbapenem-resistant Enterobacteriaceae (CRE) in the hospital environment and early identification of susceptible patients. From January 2017 to December 2021,42 strains of NDM-producing Enterobacteriaceae were gathered from the Fourth Hospital of Hebei Medical University, primarily Escherichia coli, Klebsiella pneumoniae, and Enterobacter cloacae. The micro broth dilution method combined with the Kirby-Bauer method was used to determine the minimal inhibitory concentrations (MICs) of antibiotics. The carbapenem phenotype was detected by the modified carbapenem inactivation method (mCIM) and EDTA carbapenem inactivation method (eCIM). Carbapenem genotypes were detected by colloidal gold immunochromatography and real-time fluorescence PCR. The results of antimicrobial susceptibility testing showed that all NDM-producing Enterobacteriaceae were multiple antibiotic resistant, but the sensitivity rate to amikacin was high. Invasive surgery prior to culture, the use of excessive amounts of different antibiotics, the use of glucocorticoids, and ICU hospitalization were clinical characteristics of NDM-producing Enterobacteriaceae infection. Molecular typing of NDM-producing Escherichia coli and Klebsiella pneumoniae was carried out by Multilocus Sequence Typing (MLST), and the phylogenetic trees were constructed. Eight sequence types (STs) and two NDM variants were detected in 11 strains of Klebsiella pneumoniae, primarily ST17, and NDM-1. A total of 8 STs and 4 NDM variants were detected in 16 strains of Escherichia coli, mainly ST410, ST167, and NDM-5. For high-risk patients who have CRE infection, CRE screening should be done as soon as feasible to adopt prompt and efficient intervention measures to prevent outbreaks in the hospital.
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Affiliation(s)
- Mengsi Zhao
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China
| | - Jing He
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China
| | - Ran Zhang
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China
| | - Junhua Feng
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China
| | - Yanli Deng
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China
| | - Jinyan Zhang
- Department of Clinical Laboratory, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050000, China.
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Shen M, Chen X, He J, Xiong L, Tian R, Yang G, Zha H, Wu K. Antimicrobial Resistance Patterns, Sequence Types, Virulence and Carbapenemase Genes of Carbapenem-Resistant Klebsiella pneumoniae Clinical Isolates from a Tertiary Care Teaching Hospital in Zunyi, China. Infect Drug Resist 2023; 16:637-649. [PMID: 36743338 PMCID: PMC9893843 DOI: 10.2147/idr.s398304] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/10/2023] [Indexed: 01/30/2023] Open
Abstract
Purpose Carbapenem-resistant Klebsiella pneumoniae (CRKP) has seriously threatened public health worldwide. This study aimed to investigate the antimicrobial resistance patterns, sequence types (STs), virulence and carbapenemase genes of CRKP isolates from patients in Zunyi, China. Methods CRKP isolates were collected from the First People's Hospital of Zunyi between January 2018 and December 2020. Antimicrobial susceptibility was determined using a VITEK®2 analyzer and confirmed using either the broth dilution method, Kirby-Bauer method, or E-test assays. Carbapenemase production was examined using a modified carbapenem inactivation method. STs of the studied isolates were determined by multilocus sequence typing, and the presence of carbapenemase and virulence genes was examined using polymerase chain reaction assays. Results In total, 94 CRKP isolates were collected. All studied isolates produced carbapenemase, and the most common carbapenemase gene was New Delhi metallo-β-lactamase (NDM; 72.3%), followed by Klebsiella pneumoniae carbapenemase (KPC; 24.5%), and Verona integron-encoded metallo-β-lactamase (VIM; 3.2%). Of the studied isolates, 74.3% exhibited multidrug-resistant (MDR) phenotype, and 25.7% were either pandrug-resistant (PDR) or extensively drug-resistant (XDR) phenotypes. The most prevalent sequence type was ST2407 (37.2%), followed by ST76 (21.3%) and ST11 (11.7%). The NDM gene was present in 97.1% of ST2407 isolates and 90.0% of ST76 isolates, whereas the KPC gene was present in 90.9% of ST11 isolates. The majority of the isolates carried wabG, uge, and fimH virulence genes, with prevalence rates of 94.7%, 92.6%, and 94.7%, respectively. Conclusion This study describes NDM-producing ST2407 and ST76, as well as KPC-producing ST11, as the major clonal types of CRKP isolates in Zunyi, China. All CRKP isolates were resistant to multiple types of antibiotics, and the majority of isolates carried carbapenemase and virulence genes. Clonal spread of NDM-producing CRKP ST2407 and ST76, and KPC-producing CRKP ST11 should be strictly monitored.
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Affiliation(s)
- Meijing Shen
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Xianghao Chen
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Jingyue He
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Lin Xiong
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Rengui Tian
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Guangwu Yang
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - He Zha
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China
| | - Kaifeng Wu
- Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China,Correspondence: Kaifeng Wu; He Zha, Department of Laboratory Medicine, the First People’s Hospital of Zunyi (The Third Affiliated Hospital of Zunyi Medical University), Zunyi, People’s Republic of China, Email ;
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Ku H, Kabwe M, Chan HT, Stanton C, Petrovski S, Batinovic S, Tucci J. Novel Drexlerviridae bacteriophage KMI8 with specific lytic activity against Klebsiella michiganensis and its biofilms. PLoS One 2021; 16:e0257102. [PMID: 34492081 PMCID: PMC8423285 DOI: 10.1371/journal.pone.0257102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/23/2021] [Indexed: 11/25/2022] Open
Abstract
The bacterial genus Klebsiella includes the closely related species K. michiganensis, K. oxytoca and K. pneumoniae, which are capable of causing severe disease in humans. In this report we describe the isolation, genomic and functional characterisation of the lytic bacteriophage KMI8 specific for K. michiganensis. KMI8 belongs to the family Drexlerviridae, and has a novel genome which shares very little homology (71.89% identity over a query cover of only 8%) with that of its closest related bacteriophages (Klebsiella bacteriophage LF20 (MW417503.1); Klebsiella bacteriophage 066039 (MW042802.1). KMI8, which possess a putative endosialidase (depolymerase) enzyme, was shown to be capable of degrading mono-biofilms of a strain of K. michiganensis that carried the polysaccharide capsule KL70 locus. This is the first report of a lytic bacteriophage for K. michiganensis, which is capable of breaking down a biofilm of this species.
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Affiliation(s)
- Heng Ku
- Department of Pharmacy and Biomedical Science, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia
| | - Mwila Kabwe
- Department of Pharmacy and Biomedical Science, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia
| | - Hiu Tat Chan
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Victoria, Australia
- Department of Microbiology, Royal Melbourne Hospital, Victoria, Australia
| | - Cassandra Stanton
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Victoria, Australia
| | - Steve Petrovski
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Victoria, Australia
| | - Steven Batinovic
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Victoria, Australia
| | - Joseph Tucci
- Department of Pharmacy and Biomedical Science, La Trobe Institute for Molecular Science, La Trobe University, Victoria, Australia
- * E-mail:
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