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Alves TDS, Rosa VS, Lara GHB, Ribeiro MG, da Silva Leite D. High frequency of chromosomal polymyxin resistance in Escherichia coli isolated from dairy farm animals and genomic analysis of mcr-1-positive strain. Braz J Microbiol 2025; 56:1303-1310. [PMID: 39964669 PMCID: PMC12095835 DOI: 10.1007/s42770-025-01634-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2024] [Accepted: 02/03/2025] [Indexed: 05/22/2025] Open
Abstract
Escherichia coli strains are naturally susceptible to polymyxins. The frequency of polymyxin resistance in E. coli associated with chromosomal mutations is usually low (0.2-0.6%). Here, we report polymyxin-resistant E. coli strains isolated from flies (Diptera: Muscomorpha) and animals (bovine, equine, canine, and sheep) cohabitants on two dairy farms, A and B (Botucatu, State of Sao Paulo, Brazil), in 2015. We isolated 877 E. coli from the external surface of flies and healthy animal feces. The screening of polymyxin-resistant E. coli was performed using MacConkey agar with polymyxin B (2 µg/mL). We detected a high percentage of polymyxin-resistant isolates from flies (33.33%; 66/198) and farm animals (46.09%; 313/679). Fisher's exact test revealed no associations between polymyxin resistant and multidrug resistant strains. We investigated mcr genes (mcr-1, mcr-2, mcr-3, mcr-4, and mcr-5) using PCR, and five E. coli from calves (farm B) present the mcr-1 gene. Sanger sequencing and conjugation assays were performed for gene confirmation. All five mcr-1-positive E. coli showed fingerprints more than 80% similar assayed by pulsed-field gel electrophoresis. The minimum inhibitory concentrations (MICs) for polymyxin B against mcr-1-positive E. coli were 4 µg/mL (two strains), and 8 µg/mL (three strains). Whole-genome sequencing showed mcr-1.1 gene in the IncX4 plasmid and a class 1 integron unusual harboring sul3 and qacL as a non-variable structure. In Brazil, the therapeutic use of polymyxin is allowed, but stewardship in dairy cattle is uncommon; thus, our data indicate a probable selection of polymyxin-resistant strains related to environmental pressure.
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Affiliation(s)
- Taila Dos Santos Alves
- Departamento de Genética, Evolução, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 6109, Campinas, São Paulo, CEP 13083-862, Brazil.
| | - Vinícius Sanches Rosa
- Departamento de Genética, Evolução, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 6109, Campinas, São Paulo, CEP 13083-862, Brazil
- Centro de Ciência e Qualidade dos Alimentos, Instituto de Tecnologia de Alimentos- ITAL, 139, Campinas, São Paulo, CEP 13070-178, Brazil
| | - Gustavo Henrique Batista Lara
- Departamento de Produção Animal e Medicina Veterinária Preventiva, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista - UNESP, 560, Botucatu, São Paulo, CEP 18618-681, Brazil
| | - Márcio Garcia Ribeiro
- Departamento de Produção Animal e Medicina Veterinária Preventiva, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista - UNESP, 560, Botucatu, São Paulo, CEP 18618-681, Brazil
| | - Domingos da Silva Leite
- Departamento de Genética, Evolução, Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, 6109, Campinas, São Paulo, CEP 13083-862, Brazil
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Roy S, Majumdar A, Nandy S, Pal J, Veeraraghavan B, Walia K, Dutta S. First report of third-generation cephalosporin-resistant clinical isolate of Salmonella Bareilly ST203 harbouring plasmid-mediated AmpC β-lactamase CMY6 from India: Genome characteristics and transmissibility. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2025; 130:105736. [PMID: 40057151 DOI: 10.1016/j.meegid.2025.105736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2025] [Revised: 03/04/2025] [Accepted: 03/05/2025] [Indexed: 04/06/2025]
Abstract
Non-typhoidal Salmonella (NTS) infections are a major public health concern in India because of inadequate knowledge of antimicrobial resistance, limiting therapeutic options. The study aimed to characterize and analyse the genome of a 3rd-generation cephalosporins (3GCs)-resistant clinical isolate of Salmonella Bareilly-harbouring plasmid-mediated AmpC (pAmpC) CMY-6. Identification, antibiotic susceptibility and Whole Genome Sequencing (WGS)-based analysis were performed. Transmissibility, replicon types of blaCMY-6-harbouring plasmid were evaluated. S. Bareilly ST203 (Clonal-Complex 206.2) was isolated from clinical specimen of a paediatric patient and was found to be multidrug-resistant with resistance to 3rd generation cephalosporins, fluoroquinolone and aminoglycosides. WGS revealed pAmpC blaCMY-6 on conjugative IncC plasmid (158,385 kb) which successfully transferred into the transconjugant with other resistance determinants (blaTEM-1A, armA, aac(6')-Ib-cr, sul1), showed higher MICs for 3GCs. Downstream regions of blaCMY-6 include blc (lipocalin), sugE (efflux protein) and truncated ecnR (entericidin R) followed by other resistance genes. Presence of ISEcp1 in the genome facilitated the transfer of blaCMY-6. Several efflux pump genes, two complete CRISPR arrays and intact phage sequences were also detected. Virulence factors associated with Salmonella Pathogenicity Islands SPI-1/SPI-2/SP-3 and their effectors indicated the virulence potential of this strain. To the best of our knowledge, genome of a 3GCs-resistant clinical isolate of S. Bareilly-harbouring pAmpC blaCMY-6 was reported and analysed for the first time in this study. S. Bareilly was found to cause outbreaks in earlier reports but lower resistance was reported in this serovar compared to other NTS. As infections by NTS are concerning, early detection of such strains is of utmost importance.
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Affiliation(s)
- Subhasree Roy
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (ICMR-NIRBI), Kolkata, India.
| | - Agniva Majumdar
- Division of Virology, ICMR-National Institute for Research in Bacterial Infections (ICMR-NIRBI), Kolkata, India
| | - Souvik Nandy
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (ICMR-NIRBI), Kolkata, India
| | - Juhi Pal
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (ICMR-NIRBI), Kolkata, India
| | - Balaji Veeraraghavan
- Department of Clinical Microbiology, Christian Medical College, Vellore 632004, Tamil Nadu, India
| | - Kamini Walia
- Division of Epidemiology and Communicable Diseases, Indian Council of Medical Research, New Delhi, India
| | - Shanta Dutta
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (ICMR-NIRBI), Kolkata, India.
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Lima JLDC, Jayme MMA, Neves FPG, de Freitas-Almeida AC, Queiroz MLP, de Araujo FV. Antimicrobial resistance and genetic diversity of Escherichia coli isolated from marine bivalves. Braz J Microbiol 2025:10.1007/s42770-025-01696-9. [PMID: 40399594 DOI: 10.1007/s42770-025-01696-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2025] [Accepted: 05/09/2025] [Indexed: 05/23/2025] Open
Abstract
Escherichia coli can contaminate the marine environment through sewage and accumulate in bivalve molluscs. We assessed antimicrobial resistance (AMR) mechanisms and genetic diversity of 69 E. coli isolates recovered from in natura, boiled, and purchased Perna perna mussels in Niterói city, Brazil. All isolates were sensitive to cefoxitin, imipenem, meropenem, and fosfomycin. In contrast, 61 (88.4%) isolates were not susceptible to streptomycin. We found ten (14.5%) multidrug-resistant (MDR) isolates. Extended-spectrum beta-lactamase (ESBL) production was detected in 30 (43.5%) isolates, with 14 (46.7%) isolates carrying ESBL genes (blaTEM, blaCTX-M9, blaSHV, blaCTX-M2, and blaCTX-M8/25). Quinolone/fluoroquinolone resistance was observed in 12 (17.4%) isolates, with qnrS and qnrB genes identified. Nine (13%) isolates were resistant to folate pathway inhibitors, with sul1 and sul2 genes identified. Only one (1.5%) isolate had the intI integrase gene. Most isolates had the A/C replicon (73.9%) and belonged to phylogenetic group B1 (50.7%). PFGE analysis revealed the existence of 54 genotypes, with four clusters containing isolates from different sources. The presence of ESBL-producing strains, AMR genes, and diverse plasmid replicons highlights the role of marine environments in AMR dissemination. Continuous AMR surveillance in marine ecosystems is crucial to mitigate public health risks linked to seafood consumption.
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Affiliation(s)
- Jailton Lobo da Costa Lima
- Instituto Biomédico, Universidade Federal Fluminense, Alameda Barros Terra, s/n, São Domingos, Niterói, RJ, 24020-150, Brazil
| | - Marcelly Miranda Aybal Jayme
- Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Av. 28 de Setembro, 87, Vila Isabel, Rio de Janeiro, RJ, 20551-030, Brazil
| | - Felipe Piedade Gonçalves Neves
- Instituto Biomédico, Universidade Federal Fluminense, Alameda Barros Terra, s/n, São Domingos, Niterói, RJ, 24020-150, Brazil.
| | - Angela Corrêa de Freitas-Almeida
- Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Av. 28 de Setembro, 87, Vila Isabel, Rio de Janeiro, RJ, 20551-030, Brazil
| | - Mara Lúcia Penna Queiroz
- Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro, Av. 28 de Setembro, 87, Vila Isabel, Rio de Janeiro, RJ, 20551-030, Brazil
| | - Fabio Vieira de Araujo
- Faculdade de Formação de Professores, Universidade do Estado do Rio de Janeiro, Rua Doutor Francisco Portela, nº 1470, Patronato, São Gonçalo, RJ, 24435-005, Brazil
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Ribeiro-Almeida M, Mourão J, Rodrigues IC, de Carvalho AP, da Costa PM, Peixe L, Antunes P. Persistence of mcr-1-carrying E. coli in rabbit meat production: Challenges beyond long-term colistin withdrawal. Int J Food Microbiol 2025; 439:111248. [PMID: 40381227 DOI: 10.1016/j.ijfoodmicro.2025.111248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2025] [Revised: 04/24/2025] [Accepted: 05/06/2025] [Indexed: 05/20/2025]
Abstract
Colistin, a last-resort antibiotic in human medicine, has been banned in European food animal production to mitigate antimicrobial resistance. This study investigates the long-term effects of the colistin ban on the occurrence and genomic features (WGS) of colistin-resistant, mcr-carrying Escherichia coli across intensive rabbit farms (8 farms, ~600 animals/farm, fecal and farm environmental samples) in the north and center of Portugal. Colistin-resistant E. coli was detected in 25 % of groups from three farms in pre-slaughter fecal samples, with mcr-1-positive strains found throughout the lifecycle (does, offspring, and feed) in all fecal samples from one farm. A polyclonal multidrug-resistant (MDR) E. coli population carrying mcr-1 persisted over three years, mostly in pre-slaughter rabbits but also in newly arrived younger does (GP). Comparative genomic analysis (cgMLST) revealed four clusters, with closely related strains between rabbit feces and feed (ST1196, ST40) and between feces and GP (ST1196), suggesting external reservoirs, biosecurity concerns, and cross-contamination. WGS also revealed high load and diversity in virulence (EPEC and ExPEC), antibiotic resistance and genes related to metal decreased susceptibility. All mcr-1 genes were located on similar IncHI2 multireplicon plasmids, carrying sil + pco (copper) co-located with antibiotic resistance genes, and circulating in global sources. These results highlight that, despite colistin withdrawal, MDR mcr-carrying E. coli clones persist over three years in a single farm, underscoring complex co-selection pressure and biosecurity gaps. The findings underscore food safety risks via the food chain and environmental contamination. Enhanced biosecurity, feed monitoring, and One Health surveillance are essential to mitigate AMR dissemination and safeguard public health.
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Affiliation(s)
- Marisa Ribeiro-Almeida
- UCIBIO and Associate Laboratory i4HB - Institute for Health and Bioeconomy, Laboratory of Microbiology, Faculty of Pharmacy, University of Porto, Porto, Portugal; ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
| | - Joana Mourão
- Technical University of Denmark, National Food Institute, Kongens Lyngby, Copenhagen, Denmark
| | - Inês C Rodrigues
- ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal; CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Portugal
| | - André Pinto de Carvalho
- ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal; NANTA, Marco de Canaveses, Portugal
| | - Paulo Martins da Costa
- ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal; CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Portugal
| | - Luísa Peixe
- UCIBIO and Associate Laboratory i4HB - Institute for Health and Bioeconomy, Laboratory of Microbiology, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Patrícia Antunes
- UCIBIO and Associate Laboratory i4HB - Institute for Health and Bioeconomy, Laboratory of Microbiology, Faculty of Pharmacy, University of Porto, Porto, Portugal; Faculty of Nutrition and Food Sciences, University of Porto, Porto, Portugal.
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Yag F, Sezgin FM, Sevim E. Molecular characterisation of fosfomycin resistance genes in Escherichia coli isolates. Folia Microbiol (Praha) 2025:10.1007/s12223-025-01269-1. [PMID: 40329018 DOI: 10.1007/s12223-025-01269-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2024] [Accepted: 04/25/2025] [Indexed: 05/08/2025]
Abstract
Fosfomycin is a well-known antibiotic that exhibits broad-spectrum activity against various bacterial pathogens, including gram-negative strains and some gram-positive strains such as staphylococci. The use of parenteral fosfomycin has been recently revised because the antibiotic has been found to effectively manage serious infections caused by multidrug-resistant pathogens. The occurrence of fosfomycin resistance could threaten the reintroduction of this antibiotic for the treatment of bacterial infections. In this study, a total of 24 fosfomycin-resistant Escherichia coli isolates obtained from urine samples were used to investigate the prevalence and molecular epidemiology of plasmid-mediated fosfomycin resistance genes. The replication origins of the conjugative and transformant plasmids obtained from the isolates were examined using the replication origin determination method based on the polymerase chain reaction (PCR). Through the PCR process performed with the fosA, fosA3, fosB, fosC, fosC2, and fosX genes to determine fosfomycin resistance, one out of 24 samples was found to be fosA3 gene-positive. A Class-1 integron gene was detected in three fosfomycin-resistant E. coli isolates, while no Class-2 integrons were detected in any isolate. The conjugation experiments demonstrated that the fosA3 gene was transferable in one isolate that also carried the blaTEM, blaCTX-M-15, and aac(6')-ib-cr genes. Through plasmid isolation in the transconjugant E. coli isolates, it was determined that the E. coli isolate FF21 carried fosfomycin resistance on the plasmid. To ensure the continued effective use of fosfomycin as a treatment option, fosfomycin resistance needs to be detected and closely monitored. Given the global rise in plasmid-transmissible genes, we anticipate a growing resistance to fosfomycin in the near future.
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Affiliation(s)
- Funda Yag
- Department of Molecular Medicine, Kirsehir Ahi Evran University Health Sciences Institute, Kirsehir, Turkey
| | - Fikriye Milletli Sezgin
- Department of Medical Microbiology, Amasya University School of Medicine, Amasya, 05100, Turkey.
| | - Elif Sevim
- Department of Medical Biology and Genetics, Ahi Evran University School of Medicine, Kirsehir, Turkey
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6
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Wangkheimayum J, Lakhitombi Chanu N, Chanda DD, Bhattacharjee A. Transcriptional expression analysis of fosfomycin resistance determinants in Escherichia coli with MDR trait. Indian J Med Microbiol 2025; 55:100859. [PMID: 40268090 DOI: 10.1016/j.ijmmb.2025.100859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2024] [Revised: 04/16/2025] [Accepted: 04/21/2025] [Indexed: 04/25/2025]
Abstract
Fosfomycin is a therapeutic alternative for urinary tract infection (UTI). Escherichia coli produces fosfomycin modifying enzymes (fos genes) that is the contributor for resistance to this group of antimicrobials. The current research work characterizes fosfomycin resistance determinants in Escherichia coli and their transferability. Fosfomycin modifying enzyme genes were found to be carried within a plasmid of inc type FIC. Under subinhibitory concentration of fosfomycin, transcriptional expression revealed upregulation for fosA10, fosA8, fosA, and fosA2.The current study emphasizes the necessity of ongoing surveillance of E. coli resistance patterns and transmission dynamics, particularly regards to fosfomycin, to implement the best possible treatment strategy.
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Luk-In S, Phopin K, Bangmuangngam S, Chatsuwan T, Wannigama DL, Shein AMS, Plongla R, Lawung R, Yainoy S, Eiamphungporn W, Chatupheeraphat C, Tantimongcolwat T. Inhibitory effects of benzyl isothiocyanate on widespread mcr-1-harbouring IncX4 plasmid transfer. Sci Rep 2025; 15:12892. [PMID: 40234663 PMCID: PMC12000558 DOI: 10.1038/s41598-025-97424-2] [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: 07/24/2024] [Accepted: 04/04/2025] [Indexed: 04/17/2025] Open
Abstract
The global dissemination of mobile colistin resistance (mcr) genes represents a significant public health threat due to colistin's critical role in treating multidrug-resistant (MDR) bacterial infections. We identified high rates of carbapenem resistance in Escherichia coli (27.82%) and Klebsiella pneumoniae (57.98%) and colistin resistance in E. coli (7.52%) and K. pneumoniae (19.68%) among MDR clinical isolates in Thailand. We reported sequences of self-transferable IncX4 plasmids (~ 34 kb) that facilitated the spread of the mcr-1.1 gene among six diverse MDR strains, often co-transferring blaCTX-M-55. Additionally, E. coli ST101 was found to co-transfer mcr-1.1, mcr-3.5, blaCTX-M-55, and tet(X4) via three plasmids (~ 34-kb IncX4, ~ 84-kb IncFII, ~ 278-kb IncHI2), resulting in increases in MICs for colistin, ceftriaxone, and tigecycline. Core SNP analysis revealed that closely related IncX4 plasmids harbouring mcr-1 (< 35 SNP differences) were reported from at least 12 countries. We first demonstrated the inhibitory effects of benzyl isothiocyanate (BITC) on the conjugation of mcr-1-bearing IncX4 plasmids to 1.57 ± 1.00% to 48.86 ± 12.31% relative to control (100%), targeting VirB4 and VirB11 proteins, reducing ATPase activity by over 30%. This study highlights the widespread mcr-1-harbouring IncX4 plasmids and proposes BITC as a potential inhibitor to control the dissemination of colistin resistance.
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Affiliation(s)
- Sirirat Luk-In
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Kamonrat Phopin
- Center for Research Innovation and Biomedical Informatics, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Sasina Bangmuangngam
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Tanittha Chatsuwan
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Antimicrobial Resistance and Stewardship, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Dhammika Leshan Wannigama
- Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
- Department of Infectious Diseases, Faculty of Medicine Yamagata University and Yamagata University Hospital, Yamagata, Japan
- Biofilms and Antimicrobial Resistance Consortium of ODA Receiving Countries, The University of Sheffield, Sheffield, United Kingdom
- Pathogen Hunter's Research Collaborative Team, Department of Infectious Diseases and Infection Control, Yamagata Prefectural Central Hospital, Yamagata, Japan
- Yamagata Prefectural University of Health Sciences, Kamiyanagi, Yamagata, 990-2212, Japan
| | - Aye Mya Sithu Shein
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Antimicrobial Resistance and Stewardship, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Rongpong Plongla
- Center of Excellence in Antimicrobial Resistance and Stewardship, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Ratana Lawung
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Sakda Yainoy
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Warawan Eiamphungporn
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Chawalit Chatupheeraphat
- Center for Research Innovation and Biomedical Informatics, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand
| | - Tanawut Tantimongcolwat
- Center for Research Innovation and Biomedical Informatics, Faculty of Medical Technology, Mahidol University, Nakhon Pathom, Thailand.
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Zhong W, Zhou Y, Che M, Wang L, Tian X, Wang C, Cheng Y, Liu H, Zhou Z, Peng G, Zhang K, Luo Y, Shi K, Zhong Z. Extended-spectrum β-lactamase-producing Escherichia coli isolated from captive primates: characteristics and horizontal gene transfer ability analysis. PLoS One 2025; 20:e0321514. [PMID: 40215220 PMCID: PMC11990791 DOI: 10.1371/journal.pone.0321514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2024] [Accepted: 03/06/2025] [Indexed: 04/14/2025] Open
Abstract
The rapid spread of extended-spectrum β-lactamases (ESBLs)-producing Escherichia coli (ESBL-EC) around the world has become a significant challenge for humans and animals. In this study, we aimed to examine the characteristics and horizontal gene transfer (HGT) capacity of ESBL-EC derived from captive primates. We screened for ESBL-EC among a total of 444 multidrug-resistant (MDR) E. coli strains isolated from 13 zoos in China using double-disk test. ESBL genes, mobile genetic elements (MGEs), and virulence-associated genes (VAGs) in ESBL-EC were detected through polymerase chain reaction (PCR). Furthermore, conjugation experiments were conducted to examine the HGT capacity of ESBL-EC, and the population structure (phylogenetic groups and MLST) was determined. Our results showed that a total of 69 (15.54%, 69/444) ESBL-EC strains were identified, and 5 variants of blaCTX and 3 variants of blaTEM were detected. The highest detection rate was blaCTX-M-55 (49.28%, 34/69), followed by blaCTX-M-15 (39.13%, 27/69). Ten MGEs were detected and the most prevalent was IS26 (78.26%, 54/69), followed by ISEcp1 (60.87%, 42/69). Eighteen combinations of MGEs were detected, in which ISEcp1 + IS26 was predominant (18.84%, n = 13). A total of 15 VAGs were detected and the most prevalent was fimC (84.06%, 58/69), followed by sitA (78.26%, 54/69). Furthermore, HGT ability analysis results showed that 40.58% (28/69) of ESBL-EC strains exhibited the ability to engage in conjugative transfer. Plasmid typing revealed that IncFIB (78.57%, 22/28) had the highest detection rates. Furthermore, antibiotic resistance genes (ARGs) of blaTEM-135, tetA and qnrS; MGEs of IS26, trbC and ISCR3/14 showed high rates of conjugative transfer. The population structure analysis showed that the phylogroup B1 and ST2161 were the most prevalent. ESBL-EC poses a potential threat to captive primates and may spread to other animals, humans, and the environment. It is imperative to implement measures to prevent the transmission of ESBL-EC among captive primates.
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Affiliation(s)
- Wenhao Zhong
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Yuxin Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Mengjie Che
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Liqin Wang
- The Chengdu Zoo, Institute of Wild Animals, Chengdu, China
| | - Xingyu Tian
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Chengdong Wang
- China Conservation and Research Centre for the Giant Panda, Key Laboratory of SFGA on The Giant-Panda, Chengdu, Sichuan, China
| | - Yuehong Cheng
- Sichuan Wolong National Natural Reserve Administration Bureau, Wenchuan, China
| | - Haifeng Liu
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Ziyao Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Guangneng Peng
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Kun Zhang
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Yan Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Keyun Shi
- Jiangsu Yixing People’s Hospital, Yixing, China
| | - Zhijun Zhong
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
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London LY, Lim CH, Modliszewski JL, Siddiqui NY, Sysoeva TA. Draft genomes of Klebsiella pneumoniae and Streptococcus anginosus strains found in the urine of the same female patient. Microbiol Resour Announc 2025; 14:e0131124. [PMID: 40047509 PMCID: PMC11984145 DOI: 10.1128/mra.01311-24] [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: 12/14/2024] [Accepted: 02/07/2025] [Indexed: 04/11/2025] Open
Abstract
Here, we report the draft genomes of Klebsiella pneumoniae 5008-1 and Streptococcus anginosus 5008-2 strains isolated from a catheterized urine sample obtained from an asymptomatic postmenopausal woman diagnosed with recurrent urinary tract infection and receiving vaginal estrogen cream.
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Affiliation(s)
- Laricca Y. London
- Department of Biological Sciences, Alabama A&M University, Normal, Alabama, USA
| | - Chae Hee Lim
- Department of Biological Sciences, The University of Alabama in Huntsville, Huntsville, Alabama, USA
| | - Jennifer L. Modliszewski
- Duke University Center for Genomic and Computational Biology, Department of Bioinformatics and Biostatistics, Duke University, Durham, North Carolina, USA
| | - Nazema Y. Siddiqui
- Division of Urogynecology and Reconstructive Pelvic Surgery, Department of Obstetrics and Gynecology, Duke University, Durham, North Carolina, USA
| | - Tatyana A. Sysoeva
- Department of Biological Sciences, The University of Alabama in Huntsville, Huntsville, Alabama, USA
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10
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Mattioni Marchetti V, Petrizzi I, Venturelli I, Cassetti T, Meschiari M, Migliavacca R, Bitar I. Fosfomycin-resistant Escherichia coli: a FosA10 case in Italy. JAC Antimicrob Resist 2025; 7:dlaf052. [PMID: 40206832 PMCID: PMC11979095 DOI: 10.1093/jacamr/dlaf052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2025] [Accepted: 03/23/2025] [Indexed: 04/11/2025] Open
Abstract
Background FosA10-producing Enterobacterales have an extremely low incidence in Europe. Patients and methods In March 2024, an 83-year-old woman, hospitalized in the Modena Province, developed an infection with fosfomycin-resistant Escherichia coli. The patient was treated with piperacillin/tazobactam and, after 10 days, the clinical picture was resolved. Fosfomycin MIC was evaluated with the reference agar dilution method and the production of FosA enzymes by phenotypic testing. Genomic characterization was assessed using long-read sequencing technology on the Sequel I platform. Results An E. coli isolate (FO_2) was collected from both blood and urine samples and showed high-level resistance to fosfomycin (MIC > 128 mg/L). The resistance to fosfomycin was ascribed to the production of FosA-like enzymes by phenotypic testing. The genomic analysis pointed to a FosA10-producing E. coli ST69. The fosA10 gene was carried by a highly conjugative IncB/O/K/Z plasmid that showed relevant similarities with other globally circulating plasmids. Conclusions The acquisition of rare fosA-like genes in clinically relevant clones is concerning and the dissemination of FosA-producing E. coli should be continuously monitored.
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Affiliation(s)
| | - Ilaria Petrizzi
- S.C.C.D.P. Department, Microbiology and Clinical Microbiology Unit, University of Pavia, Pavia, Italy
| | | | | | | | - Roberta Migliavacca
- S.C.C.D.P. Department, Microbiology and Clinical Microbiology Unit, University of Pavia, Pavia, Italy
- I.R.C.C.S. Policlinico S. Matteo, SC Microbiology and Virology, Department of Diagnostic and Laboratory Medicine, Pavia, Italy
| | - Ibrahim Bitar
- Department of Microbiology, Faculty of Medicine, University Hospital in Pilsen, Charles University, Pilsen, Czechia
- Biomedical Center, Faculty of Medicine, Charles University, Pilsen, Czechia
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11
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Bhattacharjee A, Basak P, Mitra S, Sarkar J, Dutta S, Basu S. Co-existence of plasmid-mediated blaNDM-1 and blaNDM-5 in Escherichia coli sequence type 167 and ST101 and their discrimination through restriction digestion. Microbiol Spectr 2025; 13:e0098724. [PMID: 39998406 PMCID: PMC11960126 DOI: 10.1128/spectrum.00987-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 12/27/2024] [Indexed: 02/26/2025] Open
Abstract
The concurrent presence of multiple New Delhi metallo-β-lactamase (blaNDM) variants within an isolate often goes undetected without next-generation sequencing. This study detects and characterizes dual blaNDM variants in Escherichia coli through Sanger and whole-genome sequencing. Additionally, a rapid identification method utilizing restriction digestion was designed for detecting blaNDM variants carrying M154L mutation. Antibiotic susceptibility, minimal inhibitory concentration for meropenem and ertapenem, PCR, and Sanger sequencing of blaNDM along with genome sequencing using Illumina and Nanopore technology were conducted. Transmissibility and replicon types of blaNDM-harboring plasmids were evaluated. Restriction digestion using restriction enzyme, BtsCI was developed to distinguish between blaNDM-1 and blaNDM variants possessing M154L mutation, such as blaNDM-5, blaNDM-7 etc. Two isolates belonging to phylogroups A; ST167 and B1; ST101 and resistant to meropenem and ertapenem (≥16 mg/L) were recovered from the blood of a neonate and the rectal swab of a pregnant woman, respectively. blaNDM was detected by PCR, and Sanger sequences of blaNDM showed two peaks at 262 (G and T) and 460 (A and C) nucleotide positions indicative of more than one blaNDM variant. Hybrid assembly confirmed co-existence of blaNDM-1 and blaNDM-5 in each isolate. blaNDM-1 was located on IncY (ST167) and IncHI1A/HI1B (ST101), while blaNDM-5 was on IncFIA/FII (ST167) and IncC (ST101) plasmids in the two isolates. Digestion with BtsC1 could discriminate between blaNDM-1 and blaNDM-5. The co-existence of multiple blaNDMs, blaNDM-1, and blaNDM-5 in epidemic clones of E. coli is concerning. Restriction digestion method and Sanger sequencing can facilitate quick identification of dual blaNDM variants in a single isolate.IMPORTANCEThe global dissemination of antimicrobial resistance genes is a serious concern. One such gene, blaNDM, has spread globally via plasmids. blaNDM confers resistance against all β-lactam antibiotics, except monobactams. Most of the earlier literature reported the presence of single blaNDM variant. However, this study reports the prevalence of dual blaNDM variants (blaNDM-1 and blaNDM-5) located on two separate plasmids identified in two distinct Escherichia coli epidemic clones ST167 and ST101 isolated from a septicemic neonate and a pregnant mother, respectively. blaNDM-5 differs from blaNDM-1 due to the presence of two point mutations (i.e., V88L and M154L). This study detected dual blaNDM variants through Sanger sequences and further validated them through hybrid-genome assembly. Detection of multiple blaNDM variants in a single isolate remains difficult until genome sequencing or southern blotting is carried out. Hence, a simple restriction digestion method was devised to rapidly screen dual blaNDM variants containing M154L mutation.
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Affiliation(s)
- Amrita Bhattacharjee
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (Formerly ICMR-National Institute of Cholera and Enteric Diseases), Kolkata, West Bengal, India
| | - Priyanka Basak
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (Formerly ICMR-National Institute of Cholera and Enteric Diseases), Kolkata, West Bengal, India
| | - Shravani Mitra
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (Formerly ICMR-National Institute of Cholera and Enteric Diseases), Kolkata, West Bengal, India
| | - Jagannath Sarkar
- Department of Biological Sciences, Bose Institute, Kolkata, West Bengal, India
| | - Shanta Dutta
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (Formerly ICMR-National Institute of Cholera and Enteric Diseases), Kolkata, West Bengal, India
| | - Sulagna Basu
- Division of Bacteriology, ICMR-National Institute for Research in Bacterial Infections (Formerly ICMR-National Institute of Cholera and Enteric Diseases), Kolkata, West Bengal, India
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12
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Kim Y, Cho H, Lee M, Hassan A, Yang SJ, Chae JC, Park KT. Emergence and Clonal Spread of Extended-Spectrum β-Lactamase-Producing Salmonella Infantis Carrying pESI Megaplasmids in Korean Retail Poultry Meat. Antibiotics (Basel) 2025; 14:366. [PMID: 40298492 PMCID: PMC12024396 DOI: 10.3390/antibiotics14040366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2025] [Revised: 03/26/2025] [Accepted: 03/31/2025] [Indexed: 04/30/2025] Open
Abstract
Background/Objectives:Salmonella is a major cause of foodborne illnesses, with multidrug-resistant (MDR) strains posing significant threats to public health worldwide. This study investigated the prevalence and antimicrobial resistance (AMR) of Salmonella, focusing on extended-spectrum β-lactamase (ESBL)-producing Salmonella in retail poultry meat in Korea. Methods: A total of 300 poultry meat samples were collected nationwide from retail markets. Multi-locus sequence typing, serotyping, and antimicrobial susceptibility testing were performed. Whole-genome sequencing (WGS) analysis was conducted against 28 representative ESBL-producing S. Infantis isolates to identify the genetic characteristics and phylogenetic relationship. Results: Salmonella was detected in 81.3% of raw poultry meat samples, with S. Infantis ST32 being the dominant serotype in chicken (53.0%) and S. Typhimurium ST19 predominant in duck (39.0%). MDR was identified in 58.2% of samples, with a significantly higher rate in chicken isolates than in duck isolates (p < 0.001). Notably, 75.3% of chicken MDR isolates were ESBL-producing S. Infantis carrying blaCTX-M-65. WGS of 28 geographically and phenotypically representative ESBL-producing S. Infantis revealed five clonal clusters, suggesting the widespread dissemination of ESBL-producing S. Infantis across Korea's poultry supply chain. All 28 ESBL-producing S. Infantis isolates contained a pESI-like megaplasmid, carrying multiple resistance and virulence genes, with sequences highly identical to plasmids reported in the United States, indicating potential international transmission. Conclusions: This study emphasizes the urgent need for continuous surveillance and responsible antibiotic use in livestock under a One Health framework. WGS can provide an effective tool for tracking AMR evolution and clonal spread within and across regions.
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Affiliation(s)
- Yeona Kim
- Department of Digital Anti-Aging and Healthcare, Inje University, Gimhae 50834, Republic of Korea;
| | - Hyeonwoo Cho
- Department of Biological Sciences, Inje University, Gimhae 50834, Republic of Korea; (H.C.); (M.L.)
| | - Miru Lee
- Department of Biological Sciences, Inje University, Gimhae 50834, Republic of Korea; (H.C.); (M.L.)
| | - Amany Hassan
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, USA;
- Department of Animal Medicine, Faculty of Veterinary Medicine, Alexandria University, Alexandria 21944, Egypt
| | - Soo-Jin Yang
- Department of Veterinary Microbiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Republic of Korea;
| | - Jong-Chan Chae
- Division of Biotechnology, Jeonbuk National University, Iksan 54596, Republic of Korea;
| | - Kun Taek Park
- Department of Digital Anti-Aging and Healthcare, Inje University, Gimhae 50834, Republic of Korea;
- Department of Biological Sciences, Inje University, Gimhae 50834, Republic of Korea; (H.C.); (M.L.)
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13
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Chenouf NS, Messaï CR, Carvalho I, Álvarez-Gómez T, Silva V, Zitouni A, Hakem A, Poeta P, Torres C. Serogrouping and Molecular Characterization of ESBL-Producing Avian Pathogenic Escherichia coli from Broilers and Turkeys with Colibacillosis in Algeria. Antibiotics (Basel) 2025; 14:356. [PMID: 40298547 PMCID: PMC12023931 DOI: 10.3390/antibiotics14040356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2025] [Revised: 03/10/2025] [Accepted: 03/17/2025] [Indexed: 04/30/2025] Open
Abstract
Avian colibacillosis caused by avian pathogenic Escherichia coli (APEC) strains is a bacterial disease responsible for enormous economic losses in the poultry industry, due to high mortality rates in farms, antibiotic therapy costs, and seizures at slaughterhouses. The aim of this study was to characterize the serogroups and molecular features of extended spectrum β-lactamase (ESBL)-producing APEC isolates recovered from 248 liver samples of 215 broilers and 33 turkeys with colibacillosis lesions in northeast Algeria. For this, microbiological tests were carried out, according to the recommended standards: E. coli isolates were recovered using standard microbiological protocols, and identification was carried out by MALDI-TOF MS. Serogrouping was performed using a rapid agglutination slide and the antisera of three O somatic groups (O1, O2, O78). Antimicrobial susceptibility was determined by the disk diffusion method. PCR assays and sequencing were used to detect antimicrobial resistance genes, integrons, phylogrouping, and MLST. Conjugation experiments were also conducted to determine the transferability of the retrieved ESBL-encoding genes. Overall, 211 (85.1%) APEC isolates were collected (one per positive sample), and 164 (77.7%) of them were typable. The O2 and O1 serogroups were the most detected (46.1% in broiler typable isolates and 61.5% in turkey typable isolates). Seventeen APEC isolates were ESBL-producers and harbored the following genes (number of isolates): blaCTX-M-1 (14), blaCTX-M-15 (2), and blaSHV-12 (1). They belonged to phylogroups D (10 isolates), B1 (6 isolates), and B2 (1 isolate). The MLST of 13 ESBL producers revealed seven STs: ST23, ST38, ST48, ST117, ST131, ST1146, and ST5087. The ESBL-encoding genes were transferred by conjugation among 15 ESBL-producing isolates, and transconjugants acquired either the IncK or IncI1 plasmids. Concerted efforts from all poultry actors are needed to establish surveillance monitoring strategies to mitigate the spread of ESBL-producing isolates implicated in avian colibacillosis.
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Affiliation(s)
- Nadia Safia Chenouf
- Faculty of Natural and Life Sciences, Earth and Universe Sciences, University Mohamed El Bachir El Ibrahimi of Bordj Bou Arreridj, El Anasser, Bordj Bou Arreridj 34000, Algeria; (N.S.C.); (C.R.M.)
- Laboratory for Exploration and Valorization of Steppe Ecosystems (EVES), Department of Biology, Faculty of Natural Sciences and Life, University of Djelfa, Moudjbara Road BP 3117, Djelfa 17000, Algeria
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure Cheikh Mohamed El Bachir El Ibrahimi, BP 92, Kouba, Algiers 16000, Algeria;
| | - Chafik Redha Messaï
- Faculty of Natural and Life Sciences, Earth and Universe Sciences, University Mohamed El Bachir El Ibrahimi of Bordj Bou Arreridj, El Anasser, Bordj Bou Arreridj 34000, Algeria; (N.S.C.); (C.R.M.)
- Laboratory of Research Health and Animal Production, High National Veterinary School, Issad Abbes Street, Oued Smar, Algiers 16000, Algeria
| | - Isabel Carvalho
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal; (I.C.); (P.P.)
| | - Tamara Álvarez-Gómez
- Area Biochemistry and Molecular Biology, OneHealth-UR Research Group, University of La Rioja, 26006 Logroño, Spain;
| | - Vanessa Silva
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal; (I.C.); (P.P.)
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Abdelghani Zitouni
- Laboratoire de Biologie des Systèmes Microbiens (LBSM), Ecole Normale Supérieure Cheikh Mohamed El Bachir El Ibrahimi, BP 92, Kouba, Algiers 16000, Algeria;
| | - Ahcene Hakem
- Agropastoralism Research Center of Djelfa, Djelfa 17000, Algeria;
| | - Patricia Poeta
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal; (I.C.); (P.P.)
- Agropastoralism Research Center of Djelfa, Djelfa 17000, Algeria;
- CECAV—Veterinary and Animal Research Centre, University of Traìs-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), 5000-801 Vila Real, Portugal
| | - Carmen Torres
- Area Biochemistry and Molecular Biology, OneHealth-UR Research Group, University of La Rioja, 26006 Logroño, Spain;
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14
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Dikaiou A, Tzimotoudis N, Sergelidis D, Papadogiannakis E, Giakkoupi P. Molecular Characterization of Extended-Spectrum ß-Lactamases-Producing Escherichia coli Isolated from a Greek Food Testing Laboratory. Antibiotics (Basel) 2025; 14:329. [PMID: 40298477 PMCID: PMC12024262 DOI: 10.3390/antibiotics14040329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2025] [Revised: 03/11/2025] [Accepted: 03/19/2025] [Indexed: 04/30/2025] Open
Abstract
Background/Objectives: Over the past decade, extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli have emerged as a significant public health concern due to their potential to spread beyond clinical settings and healthy carriers, in various environments, including in animal source foods. This study seeks to investigate the molecular characteristics of ESBL-producing E. coli strains isolated from food of animal origin, with a focus on chromosomal typing, plasmid typing, and the description of the associated resistance genes' genetic environment. Methods: Ninety-seven food of animal origin samples were tested for E. coli isolates resistant to cefotaxime. The resulting isolates were then subjected to antimicrobial susceptibility testing and PCR analysis to detect beta-lactamase genes. Additional assays, encompassing mating-out procedures, molecular typing utilizing Pulsed-Field Gel Electrophoresis, Multilocus Sequence Typing Analysis, and Oxford Nanopore Technology Lite whole plasmid sequencing, were also conducted. Results:E. coli was detected in 26 raw food specimens, generating a percentage of 27%. Fourteen of the current isolates (14%) were resistant to third generation cephalosporins, producing CTX-M-1, CTX-M-15, CTX-M-55, and SHV-12 beta-lactamases. The respective genes were accompanied by Insertion Sequences ISEcp1 and IS26, facilitating their transfer. Among plasmids harboring ESBL genes, representatives belonging to incI1 incompatibility group prevailed (5/8), followed by IncY and IncX3. Most plasmids proved conjugative. Diversity of molecular fingerprints of ESBL producing E. coli was revealed. Conclusions: To the best our knowledge, this study is the first to describe the molecular characteristics of E. coli isolates producing ESBLs sourced from foods of animal origin in Greece. The prevalence of ESBLs in our confined food collection is primarily associated with the very successful IncI1 plasmids, which were not linked to a specific E. coli genetic background. This lack of association confirms that horizontal plasmid transfer plays a more significant role than clonal dissemination in the spread of ESBL-mediated cephalosporin resistance.
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Affiliation(s)
- Aikaterini Dikaiou
- Public Health Policy Department, University of West Attica, 11521 Athens, Greece; (A.D.); (E.P.)
| | | | - Daniel Sergelidis
- Laboratory of Food Hygiene, School of Veterinary Medicine, Faculty of Health Sciences, Aristotel University of Thessaloniki, 54627 Thessaloniki, Greece;
| | | | - Panagiota Giakkoupi
- Public Health Policy Department, University of West Attica, 11521 Athens, Greece; (A.D.); (E.P.)
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15
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Bedenić B, Pospišil M, Nađ M, Bandić Pavlović D. Evolution of β-Lactam Antibiotic Resistance in Proteus Species: From Extended-Spectrum and Plasmid-Mediated AmpC β-Lactamases to Carbapenemases. Microorganisms 2025; 13:508. [PMID: 40142401 PMCID: PMC11946153 DOI: 10.3390/microorganisms13030508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2025] [Revised: 02/18/2025] [Accepted: 02/23/2025] [Indexed: 03/28/2025] Open
Abstract
The management of infectious diseases has proven to be a daunting task for clinicians worldwide, and the rapid development of antibiotic resistance among Gram-negative bacteria is making it even more challenging. The first-line therapy is empirical, and it most often comprises β-lactam antibiotics. Among Gram-negative bacteria, Proteus mirabilis, an important community and hospital pathogen associated primarily with urinary tract and wound infection, holds a special place. This review's aim was to collate and examine recent studies investigating β-lactam resistance phenotypes and mechanisms of Proteus species and the global significance of its β-lactam resistance evolution. Moreover, the genetic background of resistance traits and the role of mobile genetic elements in the dissemination of resistance genes were evaluated. P. mirabilis as the dominant pathogen develops resistance to expanded-spectrum cephalosporins (ESC) by producing extended-spectrum β-lactamases (ESBL) and plasmid-mediated AmpC β-lactamases (p-AmpC). β-lactamase-mediated resistance to carbapenems in Enterobacterales, including Proteus spp., is mostly due to expression of carbapenemases of class A (KPC); class B (metallo-β-lactamases or MBLs of IMP, VIM, or NDM series); or class D or carbapenem-hydrolyzing oxacillinases (CHDL). Previously, a dominant ESBL type in P. mirabilis was TEM-52; yet, lately, it has been replaced by CTX-M variants, particularly CTX-M-14. ESC resistance can also be mediated by p-AmpC, with CMY-16 as the dominant variant. Carbapenem resistance in Proteus spp. is a challenge due to its intrinsic resistance to colistin and tigecyclin. The first carbapenemases reported belonged to class B, most frequently VIM-1 and NDM-5. In Europe, predominantly France and Belgium, a clonal lineage positive for OXA-23 CHDL spreads rapidly undetected, due to its low-level resistance to carbapenems. The amazing capacity of Proteus spp. to accumulate a plethora of various resistance traits is leading to multidrug or extensively drug-resistant phenotypes.
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Affiliation(s)
- Branka Bedenić
- Biomedical Research Center Šalata, University of Zagreb School of Medicine, Department for Clinical Microbiology and Infection Prevention and Control, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
| | - Mladen Pospišil
- Department of Emergency Medicine, University Hospital Centre Zagreb, 10000 Zagreb, Croatia;
| | - Marina Nađ
- University of Zagreb School of Medicine, 10000 Zagreb, Croatia;
| | - Daniela Bandić Pavlović
- Department of Anesthesiology and Intensive Care, University of Zagreb School of Medicine, University Hospital Centre Zagreb, 10000 Zagreb, Croatia;
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16
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Pazos C, Gualoto M, Oña T, Velarde E, Portilla K, Cabrera-García S, Banchón C, Dávila G, Hernández-Alomia F, Bastidas-Caldes C. Molecular Detection of blaTEM and blaSHV Genes in ESBL-Producing Acinetobacter baumannii Isolated from Antarctic Soil. Microorganisms 2025; 13:482. [PMID: 40142377 PMCID: PMC11945639 DOI: 10.3390/microorganisms13030482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2025] [Revised: 02/17/2025] [Accepted: 02/19/2025] [Indexed: 03/28/2025] Open
Abstract
The phenomenon of antimicrobial resistance (AMR) in cold environments, exemplified by the Antarctic, calls into question the assumption that pristine ecosystems lack clinically significant resistance genes. This study examines the molecular basis of AMR in Acinetobacter spp. Isolated from Antarctic soil, focusing on the blaTEM and blaSHV genes associated with extended-spectrum beta-lactamase (ESBL) production; Soil samples were collected and processed to isolate Antarctic soil bacteria. Molecular detection was then conducted using polymerase chain reaction (PCR) to identify the bacteria species by 16S rRNA/rpoB and 10 different beta-lactamase-producing genes. PCR amplicons were sequenced to confirm gene identity and analyze genetic variability. Acinetobacter baumannii were identified by both microbiological and molecular tests. Notably, both the blaTEM and blaSHV genes encoding the enzymes responsible for resistance to penicillins and cephalosporins were identified, indicating the presence of resistance determinants in bacteria from extreme cold ecosystems. The nucleotide sequence analysis indicated the presence of conserved ARGs, which suggest stability and the potential for horizontal gene transfer within microbial communities. These findings emphasize that AMR is not confined to human-impacted environments but can emerge and persist in remote, cold habitats, potentially facilitated by natural reservoirs and global microbial dispersal. Understanding the presence and role of AMR in extreme environments provides insights into its global dissemination and supports the development of strategies to mitigate the spread of resistance genes in both environmental and clinical contexts.
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Affiliation(s)
- Clara Pazos
- Grupo de Investigaciones Antárticas (GIAN), Universidad Técnica del Norte (UTN), Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (C.P.); (T.O.); (E.V.); (K.P.); (S.C.-G.)
| | - Miguel Gualoto
- Scientific Advisory Committee of General Directorate of Maritime Interests and Foundation for Maritime, Riverine, Lacustrine, and Coastal Development (DIGEIM-FUNDEMAR), Quito 170403, Ecuador;
| | - Tania Oña
- Grupo de Investigaciones Antárticas (GIAN), Universidad Técnica del Norte (UTN), Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (C.P.); (T.O.); (E.V.); (K.P.); (S.C.-G.)
| | - Elizabeth Velarde
- Grupo de Investigaciones Antárticas (GIAN), Universidad Técnica del Norte (UTN), Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (C.P.); (T.O.); (E.V.); (K.P.); (S.C.-G.)
| | - Karen Portilla
- Grupo de Investigaciones Antárticas (GIAN), Universidad Técnica del Norte (UTN), Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (C.P.); (T.O.); (E.V.); (K.P.); (S.C.-G.)
| | - Santiago Cabrera-García
- Grupo de Investigaciones Antárticas (GIAN), Universidad Técnica del Norte (UTN), Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (C.P.); (T.O.); (E.V.); (K.P.); (S.C.-G.)
| | - Carlos Banchón
- Environmental Engineering, Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López (ESPAM-MFL), Campus Politécnico, 1701518, El Limón, vía Calceta-El Morro, Calceta 130601, Ecuador;
| | - Gabriela Dávila
- Maestria en Ciencias de la Salud, Facultad de Medicina, Universidad de las Américas, Quito 170125, Ecuador;
| | - Fernanda Hernández-Alomia
- Grupo de Investigación en Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de Las Américas, Quito 170125, Ecuador;
- Instituto Nacional de Biodiversidad (INABIO), Quito 170507, Ecuador
| | - Carlos Bastidas-Caldes
- Facultad de Ingeniería y Ciencias Aplicadas, Biotecnología, Universidad de Las Américas, Quito 170125, Ecuador
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Liu Z, Shen S, Zhang X, Lei J, Tang C, Wu S, Lei K, Yin J, Zhang Y, Guo Y, Geng Y, Hu F. Identification of CMY-190, a novel chromosomally encoded AmpC β-lactamase, and plasmid-encoded KPC-2 in a clinical isolate of Citrobacter youngae. Front Microbiol 2025; 16:1526882. [PMID: 40034492 PMCID: PMC11873084 DOI: 10.3389/fmicb.2025.1526882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2024] [Accepted: 01/28/2025] [Indexed: 03/05/2025] Open
Abstract
This study investigates the antibiotic resistance phenotype and genotype of Citrobacter youngae strain YS01, isolated from a peritoneal effusion sample, focusing on both chromosomal and plasmid-mediated resistance mechanisms to inform clinical antibiotic therapy. Our results reveal the presence of the chromosomally encoded β-lactamase CMY-190 and the plasmid-encoded carbapenemase KPC-2, which confer resistance to cephalosporins and carbapenems, respectively. CMY-190 exhibits substrate and inhibition profiles similar to AmpC β-lactamases and shares 88.05% amino acid identity with the plasmid-encoded enzyme CFE-2 from Citrobacter freundii pJA99. DNA sequence analysis identified the ampR gene upstream of both bla CMY-190 and bla KPC-2. In addition, genes identified surrounding the ampR-ampC regions in C. youngae, including ORF1, the fumarate operon (frdABCD), blc, and lolB, a DNA fragment not present in other Citrobacter species. The ampR-ampC genes were cloned into the PHSG398 vector and expressed in Escherichia coli DH5α, with the transformed strain showing partial resistance to cephalosporins. The bla KPC-2 was carried by Tn1721, previously identified mainly in Asian strains of Klebsiella pneumoniae. The expression of KPC-2 was confirmed by the conjugation of the donor bacterium C. youngae with E. coli J53 and by the transformation of the plasmid containing bla KPC-2 into E. coli DH5α, with all the transformed strains demonstrating resistance to carbapenems and elevated carbapenem MICs. To the best of our knowledge, this is the first report of a novel chromosomally encoded AmpC β-lactamase gene, bla CMY-190, and the emergence of bla KPC-2 in C. youngae.
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Affiliation(s)
- Zeshi Liu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Siquan Shen
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Xue Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Jing Lei
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Chengkang Tang
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Shi Wu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Ke Lei
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Jian Yin
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Yanping Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Yan Guo
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
| | - Yan Geng
- Department of Clinical Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Fupin Hu
- Institute of Antibiotics, Huashan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Clinical Pharmacology of Antibiotics, Ministry of Health, Shanghai, China
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Pearce R, Pirolo M, Goecke NB, Toppi V, Good L, Guitian J, Guardabassi L. Imported seafood is a reservoir of Enterobacteriaceae carrying CTX-M-encoding genes of high clinical relevance. Int J Food Microbiol 2025; 430:111063. [PMID: 39818165 DOI: 10.1016/j.ijfoodmicro.2025.111063] [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: 08/28/2024] [Revised: 01/07/2025] [Accepted: 01/10/2025] [Indexed: 01/18/2025]
Abstract
We determined the frequency, genotypes, phenotypes, and mobility of extended-spectrum β-lactamase (ESBL)-encoding genes in Enterobacteriaceae isolated from retail seafood products. Overall, 288 samples of fresh shrimps, catfish and seabass imported from Asia were collected from three supermarket chains in the UK (96 each). After enrichment in MacConkey broth supplemented with cefotaxime, total DNA was screened for the presence of CTX-M, SHV and TEM by real-time PCR. Positive samples were cultured on ESBL selective media and presumptive ESBL-producing isolates were confirmed by PCR and identified to the species level by MALDI-TOF-MS. CTX-M-positive isolates were further characterized by whole genome sequencing (WGS), antimicrobial susceptibility testing, and conjugation experiments. Approximately one in thirteen (7.6 %) seafood products were contaminated with ESBL-producing Enterobacteriaceae. WGS analysis revealed the presence of CTX-M-15 (n = 7), CTX-M-27 (n = 7), and CTX-M-55 (n = 7), CTX-M-14 (n = 4) among Enterobacteriaceae isolated from shrimp (n = 21) and catfish (n = 4), and FONA-6 in two Serratia fonticola isolates from seabass. The higher rate of contamination in shrimp could be due to post-harvest contamination due to human handling or washing practices during processing. Half (n = 13) of the CTX-M-producing isolates transferred blaCTX-M to laboratory E. coli via IncA/C (n = 6), IncX2 (n = 4), IncFIIK (n = 1) or non-typeable plasmids (n = 2). All plasmids contained additional resistance genes conferring resistance to antimicrobials used in aquaculture, indicating possible co-selection through the use these antimicrobials. The frequent occurrence of CTX-M-encoding genes of high clinical relevance in imported seafood, particularly shrimp, often on transferrable plasmids, underscores the need for ESBL surveillance on traded seafood, alongside quantitative risk assessment studies aimed at evaluating the potential health risks for consumers who are exposed to these bacteria via consumption of raw seafood.
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Affiliation(s)
- Ryan Pearce
- Department of Pathobiology and Population Sciences, Royal Veterinary College, NW1 0TU London, United Kingdom; Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
| | - Mattia Pirolo
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
| | - Nicole B Goecke
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
| | - Valeria Toppi
- Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark; Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy
| | - Liam Good
- Department of Pathobiology and Population Sciences, Royal Veterinary College, NW1 0TU London, United Kingdom
| | - Javier Guitian
- Department of Pathobiology and Population Sciences, Royal Veterinary College, NW1 0TU London, United Kingdom
| | - Luca Guardabassi
- Department of Pathobiology and Population Sciences, Royal Veterinary College, NW1 0TU London, United Kingdom; Department of Veterinary and Animal Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark.
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Stein M, Brinks E, Habermann D, Cho GS, Franz CMAP. Exogenous plasmid capture to characterize tetracycline-resistance plasmids in sprouts obtained from retail in Germany. Front Microbiol 2025; 16:1538973. [PMID: 40012786 PMCID: PMC11863281 DOI: 10.3389/fmicb.2025.1538973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2024] [Accepted: 01/22/2025] [Indexed: 02/28/2025] Open
Abstract
This study aimed to characterize antibiotic-resistance plasmids present in microorganisms from sprout samples using exogenous plasmid capture. Fresh mung bean sprouts were predominantly colonized by bacteria from the phyla Proteobacteria and Bacteroidetes. To capture plasmids, a plasmid-free Escherichia (E.) coli CV601 strain, containing a green fluorescent protein gene for selection, was used as the recipient strain in exogenous plasmid capture experiments. Transconjugants were selected on media containing cefotaxime or tetracycline antibiotics. While no cefotaxime-resistant transconjugants were obtained, 40 tetracycline-resistant isolates were obtained and sequenced by Illumina NextSeq short read and Nanopore MinION long read sequencing. Sequences were assembled using Unicycler hybrid assembly. Most of the captured long plasmids carried either the tet(A) or tet(D) resistance gene, belonged to the IncFI or IncFII replicon types, and were predicted as conjugative. While the smaller plasmids contained the tet(A) tetracycline resistance gene as well as additional quinolone (qnrS1), sulfonamide (sul1) and trimethoprim (dfrA1) resistance genes, the larger plasmids only contained the tet(D) resistance gene. An exception was the largest 192 kbp plasmid isolated, which contained the tet(D), as well as sulfonamide (sul1) and streptomycin (aadA1) resistance genes. The smaller plasmid was isolated from different sprout samples more often and showed a 100% identity in size (71,155 bp), while the 180 kbp plasmids showed some smaller or larger differences (in size between 157,683 to 192,360 bp). This suggested that the plasmids obtained from the similar sprout production batches could be clonally related. Nanopore MinION based 16S metagenomics showed the presence of Enterobacter (En.) cloacae, En. ludwigii, En. kobei, Citrobacter (C.) werkmanii, C. freundii, Klebsiella (K.) oxytoca and K. pneumonia, which have previously been isolated from fresh produce in Germany. These bacteria may harbor antibiotic resistance genes on plasmids that could potentially be transferred to similar genera. This study demonstrated that bacteria present in sprouts may act as the donors of antibiotic resistance plasmids which can transfer resistance to other bacteria on this product via conjugation.
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Affiliation(s)
| | | | | | - Gyu-Sung Cho
- Department of Microbiology and Biotechnology, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Hermann-Weigmann, Kiel, Germany
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Bedenić B, Luxner J, Zarfel G, Benčić A, Sardelić S, Anušić M, Vraneš J, Dobretzberger V, Barišić I, Grisold A. Characterization of Klebsiella pneumoniae Isolates Resistant to Cefiderocol from Hospitals and Outpatient Settings in Croatia. Antibiotics (Basel) 2025; 14:154. [PMID: 40001398 PMCID: PMC11851357 DOI: 10.3390/antibiotics14020154] [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: 12/27/2024] [Revised: 01/28/2025] [Accepted: 01/30/2025] [Indexed: 02/27/2025] Open
Abstract
BACKGROUND/OBJECTIVES We conducted this study to evaluate the genotypic and phenotypic profiles of carbapenem-resistant Klebsiella pneumoniae (CRKP) isolates, exhibiting resistance to cefiderocol (FDC), focusing on antibiotic susceptibility, β-lactamase production, the genetic environment of blaCARB and blaESBL genes and molecular epidemiology. FDC is now a last-line antibiotic for severe infections due to CRKP. METHODS Susceptibility to a wide range of antibiotics was determined by the disk diffusion and broth microdilution method. Carbapenemases were screened by a modified Hodge test while carbapenem hydrolysis was investigated using mCIM and eCIM tests. The screening for β-lactamase and fluoroquinolone cluster resistance genes was carried out by PCR. Plasmids were characterized by PCR-based replicon typing (PBRT). An inter-array genotyping CarbaResist test and whole genome sequencing (WGS) were applied on selected isolates. RESULTS All of the 31 isolates studied exhibited high-level resistance to amoxicillin-clavulanate, piperacillin-tazobactam, cefuroxime, expanded-spectrum cephalosporins (ESC), cefepime, ceftolozan-tazobactam and ciprofloxacin and the majority to gentamicin, and amikacin. Colistin and ceftazidime-avibactam preserved activity against 71% and 87% of the isolates, respectively. The combined disk method with clavulanic acid was positive in all but one isolate, indicating the production of an ESBL. Twenty-eight isolates carried one single carbapenemase-encoding gene, whereas three harbored double blaCARB genes. Among the studied isolates, 61% carried blaOXA-48, 29% blaKPC and 12.9% blaNDM genes. The inter-array genotyping CarbaResist test and WGS identified additional aminoglycoside-, sulphonamide- and trimethoprim-resistance genes. CONCLUSION To our knowledge, this is the first study on FDC resistance in Croatia. The diffusion of FDC-resistant isolates was detected in both hospital and outpatient settings, emphasizing the need for a "One Health" approach.
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Affiliation(s)
- Branka Bedenić
- Biomedical Research Center-BIMIS, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
- Clinical Department for Clinical Microbiology and Infection Control and Prevention, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
| | - Josefa Luxner
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8036 Graz, Austria; (J.L.); (G.Z.); (A.G.)
| | - Gernot Zarfel
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8036 Graz, Austria; (J.L.); (G.Z.); (A.G.)
| | - Ana Benčić
- Department of Gynecology and Obstetrics, University Hospital Centre Sestre Milosrdnice, 10000 Zagreb, Croatia;
| | - Sanda Sardelić
- Department of Microbiology and Parasitology, University Hospital of Split, 21000 Split, Croatia;
| | - Maja Anušić
- Department of Clinical Microbiology, Dr. Andrija Štampar Teaching Institute of Public Health Zagreb, 10000 Zagreb, Croatia; (M.A.); (J.V.)
| | - Jasmina Vraneš
- Department of Clinical Microbiology, Dr. Andrija Štampar Teaching Institute of Public Health Zagreb, 10000 Zagreb, Croatia; (M.A.); (J.V.)
- Department of Medical Microbiology and Parasitology, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Verena Dobretzberger
- Department of Molecular Diagnostics, Austrian Institute for Technology, 1210 Vienna, Austria; (V.D.); (I.B.)
| | - Ivan Barišić
- Department of Molecular Diagnostics, Austrian Institute for Technology, 1210 Vienna, Austria; (V.D.); (I.B.)
| | - Andrea Grisold
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8036 Graz, Austria; (J.L.); (G.Z.); (A.G.)
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21
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Zhang Z, Zhao H, Shi C. Clonal Spread and Genetic Mechanisms Underpinning Ciprofloxacin Resistance in Salmonella enteritidis. Foods 2025; 14:289. [PMID: 39856955 PMCID: PMC11765419 DOI: 10.3390/foods14020289] [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: 12/08/2024] [Revised: 12/30/2024] [Accepted: 01/14/2025] [Indexed: 01/27/2025] Open
Abstract
Salmonella enteritidis is a major cause of foodborne illness worldwide, and the emergence of ciprofloxacin-resistant strains poses a significant threat to food safety and public health. This study aimed to investigate the prevalence, spread, and mechanisms of ciprofloxacin resistance in S. enteritidis isolates from food and patient samples in Shanghai, China. A total of 1625 S. enteritidis isolates were screened, and 34 (2.1%) exhibited resistance to ciprofloxacin. Pulsed-field gel electrophoresis (PFGE) results suggested that clonal spread might have persisted among these 34 isolates in the local area for several years. Multiple plasmid-mediated quinolone resistance (PMQR) genes, GyrA mutations in the quinolone resistance-determining region (QRDR), and overexpression of RND efflux pumps were identified as potential contributors to ciprofloxacin resistance. PMQR genes oqxAB, qnrA, qnrB, and aac(6')-Ib-cr as well as GyrA mutations S83Y, S83R, D87Y, D87G, D87N, and S83Y-D87Y were identified. The co-transfer of the PMQR gene oqxAB with the ESBL gene blaCTX-M-14/55 on an IncHI2 plasmid with a size of ~245 kbp was observed through conjugation, highlighting the role of horizontal gene transfer in the dissemination of antibiotic resistance. Sequencing of the oqxAB-bearing plasmid p12519A revealed a 248,746 bp sequence with a typical IncHI2 backbone. A 53,104 bp multidrug resistance region (MRR) was identified, containing two key antibiotic resistance determinants: IS26-oqxR-oqxAB-IS26 and IS26-ΔISEcp1-blaCTX-M-14-IS903B. The findings of this study indicate that ciprofloxacin-resistant S. Enteritidis poses a significant threat to food safety and public health. The persistence of clonal spread and the horizontal transfer of resistance genes highlight the need for enhanced surveillance and control measures to prevent the further spread of antibiotic resistance.
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Affiliation(s)
| | | | - Chunlei Shi
- MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology and State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China; (Z.Z.); (H.Z.)
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22
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Liu H, Xia N, Suksawat F, Tengjaroenkul B, Hu Y, Zhou X, Li X, Huang C, Bao Y, Wu Q, Zhang C, Angkititrakul S, Xiang B, Wu X. Prevalence and characterization of IncQ1α-mediated multi-drug resistance in Proteus mirabilis Isolated from pigs in Kunming, Yunnan, China. Front Microbiol 2025; 15:1483633. [PMID: 39850143 PMCID: PMC11754265 DOI: 10.3389/fmicb.2024.1483633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Accepted: 11/07/2024] [Indexed: 01/25/2025] Open
Abstract
Background Proteus mirabilis is a conditionally pathogenic bacterium that is inherently resistant to polymyxin and tigecycline, largely due to antibiotic resistance genes (ARGs). These ARGs can be horizontally transferred to other bacteria, raising concerns about the Inc plasmid-mediated ARG transmission from Proteus mirabilis, which poses a serious public health threat. This study aims to investigate the presence of Inc plasmid types in pig-derived Proteus mirabilis in Kunming, Yunnan, China. Methods Fecal samples were collected from pig farms across six districts of Kunming (Luquan, Jinning, Yiliang, Anning, Songming, and Xundian) from 2022 to 2023. Proteus mirabilis isolates were identified using IDS and 16S rRNA gene sequencing. Then, positive strains underwent antimicrobial susceptibility testing and incompatibility plasmid typing. Multi-drug-resistant isolates with positive incompatibility plasmid genes were selected for whole-genome sequencing. Resistance and Inc group data were then isolated and compared with 126 complete genome sequences from public databases. Whole-genome multi-locus sequence typing, resistance group analysis, genomic island prediction, and plasmid structural gene analysis were performed. Results A total of 30 isolates were obtained from 230 samples, yielding a prevalence of 13.04%. All isolates exhibited multi-drug resistance, with 100% resistance to cotrimoxazole, erythromycin, penicillin G, chloramphenicol, ampicillin, and streptomycin. Among these, 15 isolates tested positive for the IncQ1α plasmid repC gene. The two most multi-drug-resistant and repC-positive strains, NO. 15 and 21, were sequenced to compare genomic features on Inc groups and ARGs with public data. Genome analysis revealed that the repC gene was primarily associated with IncQ1α, with structural genes from other F-type plasmids (TraV, TraU, TraN, TraL, TraK, TraI, TraH, TraG, TraF, TraE/GumN, and TraA) also present. Strain NO. 15 carried 33 ARGs, and strain NO. 21 carried 38 ARGs, conferring resistance to tetracyclines, fluoroquinolones, aminoglycosides, sulfonamides, peptides, chloramphenicol, cephalosporins, lincomycins, macrolides, and 2-aminopyrimidines. Conclusion The repC gene is primarily associated with IncQ1α, with structural genes from other F-type plasmids. A comparison with 126 public genome datasets confirmed this association.
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Affiliation(s)
- Hongmei Liu
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis of Fujian Province University, College of Life Science, Longyan University, Fujian, China
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Na Xia
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Fanan Suksawat
- Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen, Thailand
| | | | - Yue Hu
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Xiaofeng Zhou
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Xiaojiang Li
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Cuiqin Huang
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis of Fujian Province University, College of Life Science, Longyan University, Fujian, China
| | - Yinli Bao
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis of Fujian Province University, College of Life Science, Longyan University, Fujian, China
| | - Qiong Wu
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis of Fujian Province University, College of Life Science, Longyan University, Fujian, China
| | - Chunrong Zhang
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis of Fujian Province University, College of Life Science, Longyan University, Fujian, China
| | | | - Bin Xiang
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
| | - Xin Wu
- Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China
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Runcharoon K, Favro ME, Logue CM. The pathogenicity traits of avian pathogenic Escherichia coli O25-ST131 associated with avian colibacillosis in Georgia poultry and their genotypic and phenotypic overlap with other extraintestinal pathogenic E. coli. J Appl Microbiol 2025; 136:lxaf015. [PMID: 39814575 DOI: 10.1093/jambio/lxaf015] [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: 09/19/2024] [Revised: 01/03/2025] [Accepted: 01/10/2025] [Indexed: 01/18/2025]
Abstract
AIMS To characterize Escherichia coli O25 ST131 (O25-ST131) isolated from Georgia poultry-a "global high-risk" clonal strain. METHODS AND RESULTS Using multiplex PCR to detect target genes in 98 isolates of avian pathogenic E. coli (APEC) O25 recovered from avians diagnosed with colibacillosis (n = 87) and healthy chicks (n = 11) in Georgia, USA. Eighty-eight isolates were classified as sequence type ST131 clade b and 56% (n = 49) belong to the phylogenetic group B2. Overall, 17% were identified as uropathogenic E. coli (UPEC)-like and 94% of the isolates formed strong to moderate biofilms. The extended-spectrum β-lactamases encoding genes, blaCTX M-15 (24%), carbapenemases encoding genes, and blaOXA48 (16%) were also detected. The isolates harbored FIB (88%), FIC (28%), A/C (14%), and FIIA (6%) plasmid replicons. Interestingly, 78% of the isolates were found to be resistant to chicken serum and 92% showed capabilities for growth in human urine. The isolates showed phenotypic resistance to several antibiotics including chloramphenicol (63%), ciprofloxacin (57%), trimethoprim-sulfamethoxazole (28%), streptomycin (17%), and cefoxitin and meropenem (14%) using the national antimicrobial resistance monitoring system panel. CONCLUSIONS Overall, our study provides evidence of the virulence of these global "high-risk" clones in Georgia poultry with some isolates showing genotypic overlap between APEC and UPEC. Also, this clone harbored several virulence genes, antimicrobial-resistant genes, and plasmids. Interestingly, the majority of APEC O25-ST131 isolates can survive and grow in both chicken serum and human urine and warrant further investigation of their potential pathogenicity for both chickens and humans.
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Affiliation(s)
- Klao Runcharoon
- Department of Population Health, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Margaret E Favro
- Department of Population Health, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA 30602, USA
| | - Catherine M Logue
- Department of Population Health, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA 30602, USA
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Zhou X, Yi S, Kuang D, Shi C, Qu C. Analysis of Efflux Pump Contributions and Plasmid-Mediated Genetic Determinants in Ciprofloxacin-Resistant Salmonella. Pathogens 2024; 13:1126. [PMID: 39770385 PMCID: PMC11676056 DOI: 10.3390/pathogens13121126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2024] [Revised: 12/07/2024] [Accepted: 12/17/2024] [Indexed: 01/11/2025] Open
Abstract
This study aimed to explore the interactions among genetic determinants influencing ciprofloxacin resistance in Salmonella. Treatment with PAβN, an efflux pump inhibitor, resulted in a 4-32-fold reduction in the minimum inhibitory concentration (MIC) across all 18 ciprofloxacin-resistant Salmonella isolates. Notably, isolates without point mutations reverted from resistance to sensitivity. The efflux pump played a crucial role in resistance development, particularly in serovar Enteritidis, where PAβN treatment caused a more significant MIC reduction (16-32-fold) in five strains carrying the GyrA (Asp87Tyr) mutation, which initially exhibited high MICs (8 μg/mL). Several resistance genes were identified on transferable plasmids: oqxAB and aac(6')-Ib-cr were associated with IncF plasmids in S. Enteritidis, IncA/C plasmids in S. Typhimurium, and IncHI2 plasmids in S. Virchow. Additionally, qnrS1 and/or qepA were carried by IncA/C plasmids in S. Thompson. Whole-genome sequencing revealed the presence of an oqxAB module integrated into the chromosomal DNA of S. Derby. Although the MICs of ciprofloxacin in transconjugants and transformants remained low (1-4 μg/mL), they exceeded the clinical breakpoint for susceptibility. These findings highlight the synergistic impact of efflux pumps and plasmid-mediated resistance mechanisms, contributing to the increasing prevalence of ciprofloxacin resistance and posing a significant threat to food safety.
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Affiliation(s)
- Xiujuan Zhou
- College of Public Health, Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
- School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China (C.S.)
| | - Shanrong Yi
- School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China (C.S.)
| | - Dai Kuang
- School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China (C.S.)
| | - Chunlei Shi
- School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China (C.S.)
| | - Chunbo Qu
- College of Public Health, Shanghai University of Medicine & Health Sciences, Shanghai 201318, China
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Zhang S, Shu Y, Yang Z, Zhong Z, Wang M, Jia R, Chen S, Liu M, Zhu D, Zhao X, Wu Y, Yang Q, Huang J, Ou X, Sun D, Tian B, Wu Z, He Y, Cheng A. Decoding the enigma: unveiling the transmission characteristics of waterfowl-associated bla NDM-5-positive Escherichia coli in select regions of China. Front Microbiol 2024; 15:1501594. [PMID: 39717269 PMCID: PMC11663885 DOI: 10.3389/fmicb.2024.1501594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2024] [Accepted: 11/18/2024] [Indexed: 12/25/2024] Open
Abstract
Escherichia coli (E. coli) serves as a critical indicator microorganism for assessing the prevalence and dissemination of antibiotic resistance, notably harboring various antibiotic-resistant genes (ARGs). Among these, the emergence of the bla NDM gene represents a significant threat to public health, especially since carbapenem antibiotics are vital for treating severe infections caused by Gram-negative bacteria. This study aimed to characterize the antibiotic resistance features of bla NDM-5-positive E. coli strains isolated from waterfowl in several regions of China and elucidate the dissemination patterns of the bla NDM-5 gene. We successfully isolated 103 bla NDM-5-positive E. coli strains from 431 intestinal fecal samples obtained from waterfowl across five provincial-level units in China, with all strains exhibiting multidrug resistance (MDR). Notably, the bla NDM-5 gene was identified on plasmids, which facilitate efficient and stable horizontal gene transfer (HGT). Our adaptability assays indicated that while the bla NDM-5-positive plasmid imposed a fitness cost on the host bacteria, the NDM-5 protein was successfully induced and purified, exhibiting significant enzymatic activity. One strain, designated DY51, exhibited a minimum inhibitory concentration (MIC) for imipenem of 4 mg/L, which escalated to 512 mg/L following exposure to increasing imipenem doses. This altered strain demonstrated stable resistance to imipenem alongside improved adaptability, correlating with elevated relative expression levels of the bla NDM-5 and overexpression of efflux pumps. Collectively, this study highlights the horizontal dissemination of the bla NDM-5 plasmid among E. coli strains, confirms the associated fitness costs, and provides insights into the mechanisms underlying the stable increase in antibiotic resistance to imipenem. These findings offer a theoretical framework for understanding the dissemination dynamics of bla NDM-5 in E. coli, which is essential for developing effective strategies to combat carbapenem antibiotic resistance.
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Affiliation(s)
- Shaqiu Zhang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Yanxi Shu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhechen Yang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhijun Zhong
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Mingshu Wang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Renyong Jia
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Shun Chen
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Mafeng Liu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Dekang Zhu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Xinxin Zhao
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Ying Wu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Qiao Yang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Juan Huang
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Xumin Ou
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Di Sun
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Bin Tian
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Zhen Wu
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Yu He
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
| | - Anchun Cheng
- Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Veterinary Medicine and Immunology, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- Engineering Research Center of Southwest Animal Disease Prevention and Control Technology, Ministry of Education of the P.R. China, Chengdu, China
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Masarikova M, Sukkar I, Jamborova I, Medvecky M, Papousek I, Literak I, Cizek A, Dolejska M. Antibiotic-resistant Escherichia coli from treated municipal wastewaters and Black-headed Gull nestlings on the recipient river. One Health 2024; 19:100901. [PMID: 39399230 PMCID: PMC11470789 DOI: 10.1016/j.onehlt.2024.100901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 08/20/2024] [Accepted: 09/20/2024] [Indexed: 10/15/2024] Open
Abstract
Wastewaters belong among the most important sources of environmental pollution, including antibiotic-resistant bacteria. The aim of the study was to evaluate treated wastewaters as a possible transmission pathway for bacterial colonisation of gulls occupying the receiving river. A collection of antibiotic-resistant Escherichia coli originating both from treated municipal wastewaters discharged to the river Svratka (Czech Republic) and nestlings of Black-headed Gull (Chroicocephalus ridibundus) living 35 km downstream of the outlet was obtained using selective cultivation. Isolates were further characterised by various phenotyping and genotyping methods. From a total of 670 E. coli isolates (450 from effluents, 220 from gulls), 86 isolates (41 from effluents, 45 from gulls) showed identical antibiotic resistance phenotype and genotype and were further analysed for clonal relatedness using pulsed-field gel electrophoresis (PFGE). Despite the overall high diversity of the isolates, 21 isolates from both sources showed similar PFGE profiles. Isolates belonging to epidemiologically important sequence types (ST131, 15 isolates; ST23, three isolates) were subjected to whole-genome sequencing. Subsequent phylogenetic analysis did not reveal any close clonal relationship between the isolates from the effluents and gulls' nestlings with the closest strains showing 90 SNPs difference. Although our study did not provide direct evidence of transmission of antibiotic-resistant E. coli to wild gulls via treated wastewaters, we observed gull chicks as carriers of diverse multi-resistant E. coli, including high-risk clones, posing risk of further bacterial contamination of the surrounding environment.
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Affiliation(s)
- Martina Masarikova
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Brno, Czech Republic
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Iva Sukkar
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
- Biomedical Center, Faculty of Medicine, Charles University, Pilsen, Czech Republic
| | - Ivana Jamborova
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Matej Medvecky
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Ivo Papousek
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Ivan Literak
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Alois Cizek
- Department of Infectious Diseases and Microbiology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Brno, Czech Republic
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
| | - Monika Dolejska
- Central European Institute of Technology, University of Veterinary Sciences Brno, Brno, Czech Republic
- Biomedical Center, Faculty of Medicine, Charles University, Pilsen, Czech Republic
- Department of Biology and Wildlife Diseases, Faculty of Veterinary Hygiene and Ecology, University of Veterinary Sciences Brno, Brno, Czech Republic
- Division of Clinical Microbiology and Immunology, Department of Laboratory Medicine, The University Hospital Brno, Czech Republic
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Khine NO, Shah AA, Chatsuwan T, Yindee J, Supimon N, Saenkankam I, Hampson DJ, Prapasarakul N. Genetic characterization and clonal analysis of carbapenemase-producing Escherichia coli and Klebsiella pneumoniae from canine and human origins. Front Vet Sci 2024; 11:1464934. [PMID: 39654836 PMCID: PMC11626800 DOI: 10.3389/fvets.2024.1464934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2024] [Accepted: 11/08/2024] [Indexed: 12/12/2024] Open
Abstract
Introduction Carbapenem-resistant Enterobacterales (CRE), particularly carbapenemase-producing Escherichia coli and Klebsiella pneumoniae, pose a significant global health challenge due to their resistance to last-resort antibiotics. This study investigates the genetic characteristics and clonal relationships of CRE isolated from canine and human clinical samples in Bangkok to understand potential interspecies transmission. Methods Fifty-two CRE isolates were collected from 477 clinical samples from dogs and humans at Chulalongkorn University between 2017-2021. Bacterial species were identified using MALDI-TOF, and antimicrobial resistance was confirmed through broth microdilution testing. Genetic analyses included plasmid replicon typing, multilocus sequence typing (MLST), whole genome sequencing (WGS), and pulsed-field gel electrophoresis (PFGE) to assess resistance genes and clonal relatedness. Results CRE isolates from both species exhibited genetic variability with high ARG counts, particularly in human isolates. MLST identified ST410 in most E. coli isolates from both dogs and humans, and IncFIA/IncFIB plasmids were predominant among blaNDM-positive isolates. PFGE patterns and SNP analysis showed no clonal relationship between canine and human isolates, suggesting independent acquisition pathways for CRE in the two hosts. Discussion The study highlights the absence of direct clonal transmission between canine and human isolates but reveals overlapping sequence types and plasmid types. The findings underscore the potential for interspecies transmission under certain conditions, emphasizing the importance of a One Health approach for monitoring CRE in both human and animal populations.
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Affiliation(s)
- Nwai Oo Khine
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Asad Ali Shah
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Tanittha Chatsuwan
- Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Jitrapa Yindee
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Natthapong Supimon
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Imporn Saenkankam
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | | | - Nuvee Prapasarakul
- Department of Microbiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellency in Diagnosis and Monitoring of Animal Pathogens (CEDMAP), Bangkok, Thailand
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Cheng M, Dai JJ, Zhang JF, Su YT, Guo SQ, Sun RY, Wang D, Sun J, Liao XP, Chen S, Fang LX. Evolution and maintenance of a large multidrug-resistant plasmid in a Salmonella enterica Typhimurium host under differing antibiotic selection pressures. mSystems 2024; 9:e0119724. [PMID: 39436144 PMCID: PMC11575406 DOI: 10.1128/msystems.01197-24] [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: 09/02/2024] [Accepted: 09/17/2024] [Indexed: 10/23/2024] Open
Abstract
The dissemination of antibiotic resistance genes (ARGs) through plasmids is a major mechanism for the development of bacterial antimicrobial resistance. The adaptation and evolution mechanisms of multidrug-resistant (MDR) plasmids with their hosts are not fully understood. Herein, we conducted experimental evolution of a 244 kb MDR plasmid (pJXP9) under various conditions including no antibiotics and mono- or combinational drug treatments of colistin (CS), cefotaxime (CTX), and ciprofloxacin (CIP). Our results showed that long-term with or without positive selections for pJXP9, spanning approximately 600 generations, led to modifications of the plasmid-encoded MDR and conjugative transfer regions. These modifications could mitigate the fitness cost of plasmid carriage and enhance plasmid maintenance. The extent of plasmid modifications and the evolution of plasmid-encoded antibiotic resistance depended on treatment type, particularly the drug class and duration of exposure. Interestingly, prolonged exposure to mono- and combinational drugs of CS and CIP resulted in a substantial loss of the plasmid-encoded MDR region and antibiotic resistance, comparable to the selection condition without antibiotic. By contrast, combinational treatment with CTX contributed to the maintenance of the MDR region over a long period of time. Furthermore, drug selection was able to maintain and even amplify the corresponding plasmid-encoded ARGs, with co-selection of ARGs in the adjacent regions. In addition, parallel mutations in chromosomal arcA were also found to be associated with pJXP9 plasmid carriage among endpoint-evolved clones from diverse treatments. Meanwhile, arcA deletion improved the persistence of pJXP9 plasmid without drugs. Overall, our findings indicated that plasmid-borne MDR region deletion and chromosomal arcA inactivation mutation jointly contributed to co-adaptation and co-evolution between MDR IncHI2 plasmid and Salmonella Typhimurium under different drug selection pressure.IMPORTANCEThe plasmid-mediated dissemination of antibiotic resistance genes has become a significant concern for human health, even though the carriage of multidrug-resistant (MDR) plasmids is frequently associated with fitness costs for the bacterial host. However, the mechanisms by which MDR plasmids and bacterial pairs evolve plasmid-mediated antibiotic resistance in the presence of antibiotic selections are not fully understood. Herein, we conducted an experimental evolution of a large multidrug-resistant plasmid in a Salmonella enterica Typhimurium host under single and combinatorial drug selection pressures. Our results show the adaptive evolution of plasmid-encoded antibiotic resistance through alterations of the MDR region in the plasmid, in particular substantial loss of the MDR region, in response to different positive selections, especially mono- and combinational drugs of colistin and ciprofloxacin. In addition, strong parallel mutations in chromosomal arcA were associated with pJXP9 carriage in Salmonella Typhimurium from diverse treatments. Our results thus highlight promoting the loss of the plasmid's MDR region could offer an alternative approach for combating plasmid-encoded antibiotic resistance.
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Affiliation(s)
- Ming Cheng
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jing-Jing Dai
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jin-Fei Zhang
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yu-Ting Su
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Si-Qi Guo
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ruan-Yang Sun
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Dong Wang
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jian Sun
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Xiao-Ping Liao
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
| | - Sheng Chen
- Department of Food Science and Nutrition, Faculty of Science, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Liang-Xing Fang
- Guangdong Laboratory for Lingnan Modern Agriculture, National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong, China
- Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, South China Agricultural University, Guangzhou, Guangdong, China
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Ma J, Gao K, Li M, Zhou J, Song X, Zhang Y, Yu Z, Yu Z, Cheng W, Zhang W, Shen A, Yang J, Sun H, Li L. Epidemiological and molecular characteristics of carbapenem-resistant Klebsiella pneumoniae from pediatric patients in Henan, China. Ann Clin Microbiol Antimicrob 2024; 23:98. [PMID: 39511610 PMCID: PMC11545200 DOI: 10.1186/s12941-024-00757-5] [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: 08/12/2024] [Accepted: 10/31/2024] [Indexed: 11/15/2024] Open
Abstract
PURPOSE Carbapenem-resistant Klebsiella pneumoniae (CRKP) is an emerging global threat, whereas its epidemiological characteristics in children are rarely reported. This study aims to analyze clinical and epidemiological characteristics of CRKP from children in Henan, China. METHODS CRKP strains were isolated from pediatric patients, and the antimicrobial susceptibility of CRKP was determined using broth microdilution methods. The epidemiological characteristics of CRKP, including specimen sources, clinical data, carbapenemase types, virulence factors, MLST and PBRT typing were analyzed. RESULTS In total, 108 CRKP isolates were isolated from specimens including sputum, blood and urine, mainly from preterm pediatric department and internal medical intensive care unit (ICU). Newborns and staying in the ICU were risk factors for crude mortality. 107 isolates exhibited a multi-drug resistant (MDR) phenotype, and one isolate was extensively drug-resistant (XDR). Bacterial susceptibility to colistin, tigecycline and trimethoprim/sulfamethoxazole was 98.10%, 78.50% and 91.43%, respectively. Carbapenemase blaKPC (86.11%) was predominant, followed by blaNDM (5.56%) and blaIMP (2.78%). Two strains co-harbored blaKPC-blaNDM, one had blaKPC-blaIMP, whereas three isolates did not carry any of the analyzed carbapenemase genes. All strains possessed fimH, and 98% of the isolates possessed mrkD. Hypervirulent factors rmpA2 and iucA showed high positive rates (71.30% and 49.07%), with 48.15% of strains containing both genes. MLST analysis identified nine distinct sequence types (STs), with ST11 (82.41%) being the most common, followed by ST2154 (4.63%) and ST307 (3.70%). PBRT analysis revealed IncFII (85.19%) as the most prevalent plasmid. CONCLUSION In summary, this study reported the epidemiological features of CRKP in pediatric patients in Henan, China, highlighting the high prevalence of multi-drug-resistant and hypervirulent strains, and underscoring the significance of continuous surveillance.
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Affiliation(s)
- Jiayue Ma
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Kaijie Gao
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Department of Laboratory Medicine, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Mingchao Li
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Juanjuan Zhou
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Department of Laboratory Medicine, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Xiaorui Song
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Yaodong Zhang
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Zhidan Yu
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Zengyuan Yu
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Weyland Cheng
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Wancun Zhang
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Adong Shen
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Junmei Yang
- Zhengzhou Key Laboratory of Children's Infection and Immunity, Department of Laboratory Medicine, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China
| | - Huiqing Sun
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.
| | - Lifeng Li
- Henan International Joint Laboratory of Children's Infectious Diseases, Department of Neonatology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, China.
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Guo CH, Chu MJ, Liu T, Wang J, Zou M, Liu BT. High prevalence and transmission of bla NDM-positive Escherichia coli between farmed ducks and slaughtered meats: An increasing threat to food safety. Int J Food Microbiol 2024; 424:110850. [PMID: 39094468 DOI: 10.1016/j.ijfoodmicro.2024.110850] [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: 02/14/2024] [Revised: 06/18/2024] [Accepted: 07/29/2024] [Indexed: 08/04/2024]
Abstract
The emergence of carbapenem-resistant bacteria especially carbapenem-resistant Escherichia coli (CREC) in food animals poses a serious threat to food safety and public health. Reports about the dissemination of carbapenem-resistant bacteria along the food animal production chain are scattered and mainly focus on swine and chicken. Abuse of antibiotics in duck farms is common especially in China which has the largest duck production industry, however, the CREC transmission between farmed ducks and slaughtered meats remains unclear and the role of slaughterhouse in disseminating CREC among duck meats remains largely unknown. Herein, we collected 251 fecal samples from five typical duck farms along with 125 slaughtered meat samples (25 from each farm) in the corresponding slaughterhouse in Anhui Province, China, in December 2018. All samples were screened for CREC isolates which were analyzed for the presence of carbapenemase genes and colistin resistance gene mcr. The resistance profiles, transferability, pulsed-field gel electrophoresis (PFGE), whole-genome sequencing and phylogenetic analysis of the CREC isolates from both ducks and meats were further characterized. This is the first report presenting the high prevalence of blaNDM-positive CREC isolates in ducks from duck farms (57.8 %) and slaughtered meats (33.6 %) in the corresponding slaughterhouse. Among the 203 blaNDM-positive CREC isolates obtained in this study, 19.2 % harbored mcr-1 and all CREC isolates showed resistance to nearly all currently available antibiotics (except tigecycline). Of note, mcr-1 was found in 17.8 % of the meat-derived CREC carrying blaNDM. Based on the PFGE analysis, clonal spread of blaNDM-positive CREC including some also carrying mcr-1 was found between farmed ducks and slaughtered duck meats even from different farms. Special attention should be paid to the clonal dissemination of meat-derived CREC within the slaughterhouse, which contributed to the high prevalence of blaNDM in slaughtered meats. Additionally, horizontal transmission mainly mediated by transferable blaNDM-5-bearing IncX3 plasmids, untypable blaNDM-1-bearing plasmids and mcr-1-bearing IncHI2 plasmids further facilitated the rapid spread of such multidrug-resistant strains. Notably, the blaNDM-bearing plasmids and mcr-1-bearing plasmids in CREC from meats were highly similar to those from animals and humans. More worryingly, the phylogenomic analysis showed that CREC isolates from both ducks and corresponding meats clustered with previously reported human CREC isolates carrying mcr-1 in different geographical areas including China. These findings further prove that the CREC and resistance plasmids in farmed ducks could transmit to meats even from different farms via the slaughterhouse and then trigger infections in humans. The high prevalence and clonal transmission of CREC isolates including those also carrying mcr-1 between ducks and meats are alarming, and urgent control measures are required to reduce the dissemination of such organisms.
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Affiliation(s)
- Cai-Hong Guo
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Mei-Jun Chu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Tiantian Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Junjie Wang
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Ming Zou
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China
| | - Bao-Tao Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China.
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Car H, Dobrić M, Pospišil M, Nađ M, Luxner J, Zarfel G, Grisold A, Nikić-Hecer A, Vraneš J, Bedenić B. Comparison of Carbapenemases and Extended-Spectrum β-Lactamases and Resistance Phenotypes in Hospital- and Community-Acquired Isolates of Klebsiella pneumoniae from Croatia. Microorganisms 2024; 12:2224. [PMID: 39597613 PMCID: PMC11596078 DOI: 10.3390/microorganisms12112224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2024] [Revised: 10/31/2024] [Accepted: 10/31/2024] [Indexed: 11/29/2024] Open
Abstract
K. pneumoniae harbors various antibiotic resistance determinants like extended-spectrum and plasmid-mediated AmpC β-lactamases and carbapenemases. In the last three years, in the period of intense population aging, migrations and climate changes in Europe and Croatia as well, we observed changes in antibiotic resistance patters of carbapenem-resistant K. pneumoniae (CRKP) isolates obtained routinely in community and inpatient setting. The aim was to compare and subsequently analyze CRKP hospital and community isolates resistance mechanisms, traits and molecular epidemiology, in order to analyze the dynamic of resistance trends, carbapenemase types and plasmid epidemiology. Disk diffusion and broth dilution method were the methods of choice to determine antibiotic susceptibility. β-lactamases were screened by phenotypic methods and confirmed with PCR. In total 113 isolates were analysed. Resistance to amoxicillin-clavulanate and ertapenem was confirmed in all strains. High resistance rates (over 90%) were observed for extended-spectrum cephalosporins, and ciprofloxacin. OKNV (OXA-48, KPC, NDM, VIM) testing and PCR detected OXA-48 in 106, NDM in 7 and KPC in only one isolate. ESBLs accompanied carbapenemases in 103 isolates. IncL, associated with OXA-48, was the dominant plasmid type. No significant differences in the resistance profile and resistance determinants were found between hospital and community isolates plasmid type. The predominance of OXA-48 carbapenemase is in line with the reports from the neigbouring countries.
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Affiliation(s)
- Haris Car
- Zagreb Health School, 10000 Zagreb, Croatia;
| | - Mirela Dobrić
- Department of Anesthesiology, Intensive Medicine and Pain Management, University Hospital Centre Sestre Milosrdnice, 10000 Zagreb, Croatia;
| | - Mladen Pospišil
- Department of Emergency Medicine, University Hospital Centre Zagreb, 10000 Zagreb, Croatia;
| | - Marina Nađ
- University of Zagreb School of Medicine, 10000 Zagreb, Croatia;
| | - Josefa Luxner
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8010 Graz, Austria; (J.L.); (G.Z.); (A.G.)
| | - Gernot Zarfel
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8010 Graz, Austria; (J.L.); (G.Z.); (A.G.)
| | - Andrea Grisold
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, 8010 Graz, Austria; (J.L.); (G.Z.); (A.G.)
| | - Ana Nikić-Hecer
- Department of Microbiology and Hospital Infections, University Hospital Centre Sestre Milosrdnice, 10000 Zagreb, Croatia;
| | - Jasmina Vraneš
- Department of Microbiology and Parasitology, University of Zagreb School of Medicine, Teaching Institute of Public Health “Dr. Andrija Štampar”, 10000 Zagreb, Croatia;
| | - Branka Bedenić
- Biomedical Research Center Šalata, University of Zagreb School of Medicine, Department for Clinical Microbiology and Infection Prevention and Control, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
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Xiao L, Qin X, Xiao H, Gao Y, Sun T, Dong X, Long Y, Xia X, Li Z, Wang X, Dong Q. Molecular epidemiological investigation of Salmonella isolated from the environment, animals, foods and patients in China. Food Res Int 2024; 196:115013. [PMID: 39614471 DOI: 10.1016/j.foodres.2024.115013] [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: 06/17/2024] [Revised: 08/30/2024] [Accepted: 08/31/2024] [Indexed: 12/01/2024]
Abstract
Salmonella as a foodborne pathogen, has a very important impact on human health. This study characterized the serotype, plasmid replicon, MLST typing, resistance phenotype and resistance gene of 282 strains of Salmonella isolated from the environment, animals, foods, and patients in China. These strains are classified into four sources: poultry farms (39/282), animals (30/282), foods (164/282), and hospitals (49/282) their resistance to ciprofloxacin, levofloxacin and ceftazidime is gradually increasing. Among them, ST11, ST19 and ST314 are dominant ST types; Salmonella enteritidis, Salmonella typhimurium and Kentucky Salmonella enteritidis serotypes are the dominant serotypes. This study conducted a comprehensive molecular epidemiological investigation of Salmonella from the unique perspective of Onehealth. It was revealed that the mcr-1 carried by Salmonella mainly relies on the horizontal transfer of Inc I2 and Inc Q plasmids. And a novel integron variable region cassette arrangement pattern aadA2-aadA23-catB3-tet(B)-dfrA12-eptB has emerged in Salmonella strains. More noteworthy is the outbreak of blaTEM-148 subtype in Salmonella from food sources, in which the Inc HI plasmid played an important role.
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Affiliation(s)
- Linlin Xiao
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; Department of Laboratory Medicine, Affiliated Sixth People's Hospital South Campus, Shanghai Jiaotong University, Shanghai 201499, China
| | - Xiaojie Qin
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Hu Xiao
- Department of Laboratory Medicine, Affiliated Sixth People's Hospital South Campus, Shanghai Jiaotong University, Shanghai 201499, China
| | - Yuehua Gao
- College of Food and Bioengineering, Shaanxi University of Science and Technology, Xian, Shaanxi 710021, China
| | - Tanmei Sun
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Xiaolu Dong
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yulin Long
- Department of Laboratory Medicine, Affiliated Sixth People's Hospital South Campus, Shanghai Jiaotong University, Shanghai 201499, China
| | - Xuejuan Xia
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Zhuosi Li
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Xiang Wang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Qingli Dong
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
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Allain M, Morel-Journel T, Condamine B, Gibeaux B, Gachet B, Gschwind R, Denamur E, Landraud L. IncC plasmid genome rearrangements influence the vertical and horizontal transmission tradeoff in Escherichia coli. Antimicrob Agents Chemother 2024; 68:e0055424. [PMID: 39194203 PMCID: PMC11459957 DOI: 10.1128/aac.00554-24] [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: 04/17/2024] [Accepted: 08/07/2024] [Indexed: 08/29/2024] Open
Abstract
It has been shown that an evolutionary tradeoff between vertical (host growth rate) and horizontal (plasmid conjugation) transmissions contributes to global plasmid fitness. As conjugative IncC plasmids are important for the spread of multidrug resistance (MDR), in a broad range of bacterial hosts, we investigated vertical and horizontal transmissions of two multidrug-resistant IncC plasmids according to their backbones and MDR-region rearrangements, upon plasmid entry into a new host. We observed plasmid genome deletions after conjugation in three diverse natural Escherichia coli clinical strains, varying from null to high number depending on the plasmid, all occurring in the MDR region. The plasmid burden on bacterial fitness depended more on the strain background than on the structure of the MDR region, with deletions appearing to have no impact. Besides, we observed an increase in plasmid transfer rate, from ancestral host to new clinical recipient strains, when the IncC plasmid was rearranged. Finally, using a second set of conjugation experiments, we investigated the evolutionary tradeoff of the IncC plasmid during the critical period of plasmid establishment in E. coli K-12, by correlating the transfer rates of deleted or non-deleted IncC plasmids and their costs on the recipient strain. Plasmid deletions strongly improved conjugation efficiency with no negative growth effect. Our findings indicate that the flexibility of the MDR-region of the IncC plasmids can promote their dissemination, and provide diverse opportunities to capture new resistance genes. In a broader view, they suggest that the vertical-horizontal transmission tradeoff can be manipulated by the plasmid to improve its fitness.
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Affiliation(s)
- Margaux Allain
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
- AP-HP, Laboratoire de Microbiologie Hygiène, Hôpital Louis Mourier, Colombes, France
| | - Thibaut Morel-Journel
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
| | - Bénédicte Condamine
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
| | - Benoist Gibeaux
- AP-HP, Laboratoire de Microbiologie Hygiène, Hôpital Louis Mourier, Colombes, France
| | - Benoit Gachet
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
| | - Rémi Gschwind
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
| | - Erick Denamur
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
- AP-HP, Laboratoire de Génétique Moléculaire, Hôpital Bichat, Paris, France
| | - Luce Landraud
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, IAME, Paris, France
- AP-HP, Laboratoire de Microbiologie Hygiène, Hôpital Louis Mourier, Colombes, France
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Frolova D, Lima L, Roberts LW, Bohnenkämper L, Wittler R, Stoye J, Iqbal Z. Applying rearrangement distances to enable plasmid epidemiology with pling. Microb Genom 2024; 10:001300. [PMID: 39401066 PMCID: PMC11472880 DOI: 10.1099/mgen.0.001300] [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: 06/20/2024] [Accepted: 09/05/2024] [Indexed: 10/15/2024] Open
Abstract
Plasmids are a key vector of antibiotic resistance, but the current bioinformatics toolkit is not well suited to tracking them. The rapid structural changes seen in plasmid genomes present considerable challenges to evolutionary and epidemiological analysis. Typical approaches are either low resolution (replicon typing) or use shared k-mer content to define a genetic distance. However, this distance can both overestimate plasmid relatedness by ignoring rearrangements, and underestimate by over-penalizing gene gain/loss. Therefore a model is needed which captures the key components of how plasmid genomes evolve structurally - through gene/block gain or loss, and rearrangement. A secondary requirement is to prevent promiscuous transposable elements (TEs) leading to over-clustering of unrelated plasmids. We choose the 'Double Cut and Join Indel' (DCJ-Indel) model, in which plasmids are studied at a coarse level, as a sequence of signed integers (representing genes or aligned blocks), and the distance between two plasmids is the minimum number of rearrangement events or indels needed to transform one into the other. We show how this gives much more meaningful distances between plasmids. We introduce a software workflow pling (https://github.com/iqbal-lab-org/pling), which uses the DCJ-Indel model, to calculate distances between plasmids and then cluster them. In our approach, we combine containment distances and DCJ-Indel distances to build a TE-aware plasmid network. We demonstrate superior performance and interpretability to other plasmid clustering tools on the 'Russian Doll' dataset and a hospital transmission dataset.
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Affiliation(s)
- Daria Frolova
- European Bioinformatics Institute, Hinxton, Cambridge CB10 1SD, UK
| | - Leandro Lima
- European Bioinformatics Institute, Hinxton, Cambridge CB10 1SD, UK
| | - Leah Wendy Roberts
- Centre for Immunology and Infection Control, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Leonard Bohnenkämper
- Faculty of Technology and Center for Biotechnology (CeBiTec), Bielefeld University, Bielefeld, Germany
- Graduate School "Digital Infrastructure for the Life Sciences" (DILS), Bielefeld University, Bielefeld, Germany
| | - Roland Wittler
- Faculty of Technology and Center for Biotechnology (CeBiTec), Bielefeld University, Bielefeld, Germany
| | - Jens Stoye
- Faculty of Technology and Center for Biotechnology (CeBiTec), Bielefeld University, Bielefeld, Germany
| | - Zamin Iqbal
- European Bioinformatics Institute, Hinxton, Cambridge CB10 1SD, UK
- Milner Centre for Evolution, University of Bath, Bath, UK
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Swain PP, Sahoo S, Behera B, Behera DU, Subudhi E, Sahoo RK. Characterization of colistin-resistant carbapenemase producing Klebsiella pneumoniae in a river receiving wastewater treatment plant effluent. Lett Appl Microbiol 2024; 77:ovae090. [PMID: 39317674 DOI: 10.1093/lambio/ovae090] [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: 04/02/2024] [Revised: 08/12/2024] [Accepted: 09/23/2024] [Indexed: 09/26/2024]
Abstract
Genes conferring antibiotic resistance phenotype, particularly to last resort antibiotics, pose a significant concern globally. Wastewater treatment plant (WWTP) effluent substantially contributes to antibiotic resistance in receiving rivers, threatening human health. Globally, colistin- and carbapenem-resistant Klebsiella pneumoniae infections cause high morbidity and mortality. We investigated colistin-resistant carbapenemase-producing K. pneumoniae (Co-CRKP) isolates in Kathajodi river receiving WWTP effluent, their resistance genes, and pathogenic potential. Four isolates (Co-CRKP-7, Co-CRKP-8, Co-CRKP-10, and Co-CRKP-15) exhibited extensively drug-resistant (XDR) phenotype, harbouring blaTEM-1, blaCTX-M-15, blaNDM-5, and blaOXA-48 genes. Colistin resistance was attributed to mutations in the pmrA and pmrB genes. Virulence genes (fimH, mrkD, entB, iucA, iutA, and irp1), capsular serotypes (K1, K2) and biofilm formation in the isolates explicated their pathogenicity. Furthermore, Inc plasmid replicons (Y, FrepB, P, K/B, L/M, N, FIA, A/C, and FIB) indicated the dissemination potential of the resistance genes in Co-CRKP isolates. The multi-locus sequence typing showed that Co-CRKP-7 and Co-CRKP-8 belonged to ST42, while Co-CRKP-10 and Co-CRKP-15 were ST16 and ST231, respectively. These high-risk clones carrying multidrug resistance and virulence genes, implicated in numerous outbreaks, have spread worldwide. Our findings emphasize the necessity for effective treatment of hospital wastes to restrict the spread of clinical isolates into aquatic environments.
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Affiliation(s)
- Pragyan Paramita Swain
- Centre for Biotechnology, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
| | - Saubhagini Sahoo
- Centre for Biotechnology, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
- Department of Biotechnology, MITS School of Biotechnology, Bhubaneswar, Odisha 751024, India
| | - Birasen Behera
- Department of Microbiology, IMS and SUM Hospital, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
- ICMR-Regional Medical Research Centre, Bhubaneswar, Odisha 751023, India
| | - Dibyajyoti Uttameswar Behera
- Centre for Biotechnology, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
- ICAR-Central Tubers Crop Research Institute, Bhubaneswar, Odisha 751019, India
| | - Enketeswara Subudhi
- Centre for Biotechnology, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
| | - Rajesh Kumar Sahoo
- Centre for Biotechnology, Siksha O Anusandhan (Deemed to be University), Bhubaneswar, Odisha 751003, India
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Mikhayel M, Praud K, Leclercq S, Karam Sarkis D, Doublet B. Genomic insights into epidemic plasmids carrying bla CTX-M and mcr-1 genes in Escherichia coli from Lebanese broiler production. JAC Antimicrob Resist 2024; 6:dlae149. [PMID: 39296921 PMCID: PMC11408927 DOI: 10.1093/jacamr/dlae149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 08/12/2024] [Indexed: 09/21/2024] Open
Abstract
Background In a previous nationwide survey in the Lebanese broiler production, multidrug-resistant CTX-M-producing E. coli were found to carry the mobile colistin resistance gene mcr-1. Objectives To investigate the mobile genetic supports responsible for the spread of these resistance genes among E. coli in healthy broilers in Lebanon. Methods Thirty-three bla CTX-M and mcr-1 positive E. coli of various sequence types from 17 broilers farms were subjected to conjugation assays. Long-read sequencing (Oxford Nanopore Technologies) and hybrid assembly were performed to determine complete plasmid sequences and their phylogenetic diversity. Results Twenty-nine conjugative IncFII plasmids harboured the extended-spectrum β-lactamase genes bla CTX-M-3 (n = 25) or bla CTX-M-55 (n = 4). Highly related IncF2:A-:B-/bla CTX-M-3 plasmids differing only through IS-mediated genetic rearrangements in antibiotic resistance gene clusters were found in genetically diverse E. coli strains isolated from distant farms. The mobile colistin resistance genes mcr-1.1 and mcr-1.26 were carried by IncX4 and IncI2 plasmids. Worryingly, in one isolate, the ISEcp1-bla CTX-M-55 transposable unit was found integrated in a mcr-1.26-carrying IncX4 plasmid. Beside expanded cephalosporins and colistin resistances, all E. coli isolates were multidrug-resistant with different additional resistances against aminoglycosides, (fluoro)quinolones, fosfomycin, phenicols, sulphonamides, tetracycline and trimethoprim. Conclusions Closely related blaCTX-M-3/55-borne IncF2:A-:B- plasmids harbouring variable MDR regions and mcr-1 carrying IncX4 plasmids are widely disseminated in the E. coli population of healthy broilers in Lebanon. Further surveillance programmes of antimicrobial resistance and interventions to reduce the abusive use of medically important antibiotics are necessary to limit the spread of resistances in food-producing animals in Lebanon.
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Affiliation(s)
- Myriam Mikhayel
- INRAE, Université de Tours, ISP, Nouzilly, France
- Laboratoire des agents pathogènes, Faculté de Pharmacie, Université Saint Joseph de Beyrouth, Beirut, Lebanon
| | - Karine Praud
- INRAE, Université de Tours, ISP, Nouzilly, France
| | | | - Dolla Karam Sarkis
- Laboratoire des agents pathogènes, Faculté de Pharmacie, Université Saint Joseph de Beyrouth, Beirut, Lebanon
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Liu L, Yi S, Xu X, Zheng L, Liu H, Zhou X. Prevalence and Characteristics of Plasmid-Mediated Fosfomycin Resistance Gene fosA3 among Salmonella Enteritidis Isolates from Retail Chickens and Children with Gastroenteritis in China. Pathogens 2024; 13:816. [PMID: 39339007 PMCID: PMC11434640 DOI: 10.3390/pathogens13090816] [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: 08/30/2024] [Revised: 09/14/2024] [Accepted: 09/20/2024] [Indexed: 09/30/2024] Open
Abstract
A total of 265 Salmonella Enteritidis isolates collected from retail markets and children's hospitals in Shanghai were used to investigate the prevalence and molecular epidemiology of plasmid-mediated fosfomycin resistance genes. Nine of the isolates-7 from the 146 (4.79%) retail chicken-related samples and 2 from the 119 (1.68%) samples from clinical children-were fosfomycin-resistant (FosR). The fosA3 gene was detected in all of the nine FosR isolates, which were located on Inc F-type (8/9, 88.9%) and unknown-type (1/9, 11.1%) transferable plasmids. In total, five plasmid types, namely Inc HI2 (1/9, 11.1%), Inc I1 (3/9, 33.3%), Inc X (8/9, 88.9%), Inc FIIs (9/9, 100%), and Inc FIB (9/9, 100%), were detected in these FosR isolates, which possessed five S1 nuclease pulsed-field gel electrophoresis (S1-PFGE) profiles. The extended-spectrum β-lactamase determinant blaCTX-M-14 subtype was identified in one FosRS. Enteritidis isolate, which was located in a transferable unknown-type plasmid co-carrying fosA3 and tetR genes. Sequence homology analysis showed that this plasmid possessed high sequence similarity to previously reported blaCTX-M-14- and fosA3-positive plasmids from E. coli strains, implying that plasmids carrying the fosA3 gene might be disseminated among Enterobacterales. These findings highlight further challenges in the prevention and treatment of Enterobacteriaceae infections caused by plasmids containing fosA3.
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Affiliation(s)
- Liyuan Liu
- College of Public Health, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
| | - Shanrong Yi
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xuebin Xu
- Shanghai Center for Disease Control and Prevention, Shanghai 200336, China
| | - Liya Zheng
- College of Public Health, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
| | - Hong Liu
- Shanghai Center for Disease Control and Prevention, Shanghai 200336, China
| | - Xiujuan Zhou
- College of Public Health, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
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Yan J, Doublet B, Wiedemann A. Trends in horizontal gene transfer research in Salmonella antimicrobial resistance: a bibliometric analysis. Front Microbiol 2024; 15:1439664. [PMID: 39328914 PMCID: PMC11424403 DOI: 10.3389/fmicb.2024.1439664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Accepted: 08/28/2024] [Indexed: 09/28/2024] Open
Abstract
Horizontal gene transfer (HGT) favors the acquisition and spread of antimicrobial resistance (AMR) genes in Salmonella, making it a major public health concern. We performed a bibliometric analysis to provide the current landscape of HGT in research on Salmonella AMR and identify emerging trends and potential research directions for the future. Data were collected from the Web of Science Core Collection and limited to articles and reviews published between 1999 and 2024 in English. VOSviewer 1.6.19 and CiteSpace 6.2.R1 software were used to conduct bibliometric analysis and visualize co-occurring keywords. A total of 1,467 publications were retrieved for analysis. American researchers contributed the most articles (n = 310). In the meantime, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement have the highest citation/publication rate of 85.6. Recent studies have focused on the application of whole genome sequencing (WGS), Salmonella quinolone and colistin resistance, and the biocontrol of Salmonella AMR. These findings provide new insights into the role of HGT and help identify new targets for controlling the spread of AMR in Salmonella populations.
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Affiliation(s)
- Jin Yan
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, China
- Research Center of Digestive Disease, Central South University, Changsha, China
- IRSD - Institut de Recherche en Santé Digestive, Université́ de Toulouse, INSERM, INRAE, ENVT, UPS, Toulouse, France
| | | | - Agnès Wiedemann
- IRSD - Institut de Recherche en Santé Digestive, Université́ de Toulouse, INSERM, INRAE, ENVT, UPS, Toulouse, France
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Komori K, Aoki K, Harada S, Ishii Y, Tateda K. Plasmid-mediated acquisition and chromosomal integration of blaCTX-M-14 in a subclade of Escherichia coli ST131- H30 clade C1. Antimicrob Agents Chemother 2024; 68:e0081724. [PMID: 39133024 PMCID: PMC11373201 DOI: 10.1128/aac.00817-24] [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: 06/03/2024] [Accepted: 07/19/2024] [Indexed: 08/13/2024] Open
Abstract
Escherichia coli ST131 is a multidrug-resistant lineage associated with the global spread of extended-spectrum β-lactamase-producing organisms. Particularly, ST131 clade C1 is the most predominant clade in Japan, harboring blaCTX-M-14 at a high frequency. However, the process of resistance gene acquisition and spread remains unclear. Here, we performed whole-genome sequencing of 19 E. coli strains belonging to 12 STs and 12 fimH types collected between 1997 and 2016. Additionally, we analyzed the full-length genome sequences of 96 ST131-H30 clade C0 and C1 strains, including those obtained from this study and those registered in public databases, to understand how ST131 clade C1 acquired and spread blaCTX-M-14. We detected conjugative IncFII plasmids and IncB/O/K/Z plasmids carrying blaCTX-M-14 in diverse genetic lineages of E. coli strains from the 1990s to the 2010s, suggesting that these plasmids played an important role in the spread of blaCTX-M-14. Molecular phylogenetic and molecular clock analyses of the 96 ST131-H30 clade C0 and C1 strains identified 8 subclades. Strains harboring blaCTX-M-14 were clustered in subclades 4 and 5, and it was inferred that clade C1 acquired blaCTX-M-14 around 1993. All 34 strains belonging to subclade 5 possessed blaCTX-M-14 with ISEcp1 upstream at the same chromosomal position, indicating their common ancestor acquired blaCTX-M-14 in a single ISEcp1-mediated transposition event during the early formation of the subclade around 1999. Therefore, both the horizontal transfer of plasmids carrying blaCTX-M-14 to diverse genetic lineages and chromosomal integration in the predominant genetic lineage have contributed to the spread of blaCTX-M-14.
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Affiliation(s)
- Kohji Komori
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Kotaro Aoki
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Sohei Harada
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
- Center for the Planetary Health and Innovation Science (PHIS), The IDEC Institute, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University Graduate School of Medicine, Tokyo, Japan
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, Japan
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Kim MB, Lee YJ. Emergence of Salmonella Infantis carrying the pESI-like plasmid from eggs in egg grading and packing plants in Korea. Food Microbiol 2024; 122:104568. [PMID: 38839227 DOI: 10.1016/j.fm.2024.104568] [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: 03/04/2024] [Revised: 05/13/2024] [Accepted: 05/24/2024] [Indexed: 06/07/2024]
Abstract
The plasmid of emerging S. Infantis (pESI) or pESI-like plasmid in Salmonella enterica Infantis are consistently reported in poultry and humans worldwide. However, there has been limited research on these plasmids of S. Infantis isolated from eggs. Therefore, this study aimed to analyze the prevalence and characteristics of S. Infantis carrying the pESI-like plasmid from eggs in egg grading and packing plants. In this study, the pESI-like plasmid was only detected in 18 (78.3%) of 23 S. Infantis isolates, and it was absent in the other 9 Salmonella serovars. In particular, S. Infantis isolates carrying the pESI-like plasmid showed the significantly higher resistance to β-lactams, phenicols, cephams, aminoglycosides, quinolones, sulfonamides, and tetracyclines than Salmonella isolates without the pESI-like plasmid (p < 0.05). Moreover, all S. Infantis isolates carrying the pESI-like plasmid were identified as extended-spectrum β-lactamase (ESBL) producer, harboring the blaCTX-M-65 and blaTEM-1 genes, and carried non-β-lactamase resistance genes (ant(3'')-Ia, aph(4)-Ia, aac(3)-IVa, aph(3')-Ic, sul1, tetA, dfrA14, and floR) against five antimicrobial classes. However, all isolates without the pESI-like plasmid only carried the blaTEM-1 gene among the β-lactamase genes, and either had no non-β-lactamase resistance genes or harbored non-β-lactamase resistance genes against one or two antimicrobial classes. Furthermore, all S. Infantis isolates carrying the pESI-like plasmid carried class 1 and 2 integrons and the aadA1 gene cassette, but none of the other isolates without the pESI-like plasmid harbored integrons. In particular, D87Y substitution in the gyrA gene and IncP replicon type were observed in all the S. Infantis isolates carrying the pESI-like plasmid but not in the S. Infantis isolates without the pESI-like plasmid. The distribution of pulsotypes between pESI-positive and pESI-negative S. Infantis isolates was clearly distinguished, but all S. Infantis isolates were classified as sequence type 32, regardless of whether they carried the pESI-like plasmid. This study is the first to report the characteristics of S. Infantis carrying the pESI-like plasmid isolated from eggs and can provide valuable information for formulating strategies to control the spread of Salmonella in the egg industry worldwide.
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Affiliation(s)
- Min Beom Kim
- College of Veterinary Medicine & Institute for Veterinary Biomedical Science, Kyungpook National University, Daegu, 41556, Republic of Korea.
| | - Young Ju Lee
- College of Veterinary Medicine & Institute for Veterinary Biomedical Science, Kyungpook National University, Daegu, 41556, Republic of Korea.
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Baqar Z, Sinwat N, Prathan R, Chuanchuen R. Meat ducks as carriers of antimicrobial-resistant Escherichia coli harboring transferable R plasmids. J Vet Sci 2024; 25:e62. [PMID: 39231787 PMCID: PMC11450392 DOI: 10.4142/jvs.24074] [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: 02/24/2024] [Revised: 05/28/2024] [Accepted: 07/11/2024] [Indexed: 09/06/2024] Open
Abstract
IMPORTANCE Antimicrobial resistance (AMR) is a serious public health threat. AMR bacteria and their resistance determinants in food can be transmitted to humans through the food chain and by direct contact and disseminate directly to the environment. OBJECTIVE This study examined the AMR characteristics and transferable R plasmids in Escherichia coli isolated from meat ducks raised in an open-house system. METHODS One hundred seventy-seven (n = 177) commensal E. coli were examined for their antimicrobial susceptibilities and horizontal resistance transfer. The plasmids were examined by PCR-based plasmid replicon typing (PBRT) and plasmid multi-locus sequence typing (pMLST). RESULTS The highest resistance rate was found against ampicillin (AMP, 83.0%) and tetracycline (TET, 81.9%), and most isolates exhibited multidrug resistance (MDR) (86.4%). The R plasmids were conjugally transferred when TET (n = 4), AMP (n = 3), and chloramphenicol (n = 3) were used as a selective pressure. The three isolates transferred resistance genes either in AMP or TET. The blaCTX-M1 gene resided on conjugative plasmids. Five replicon types were identified, of which Inc FrepB was most common in the donors (n = 13, 38.4%) and transconjugants (n = 16, 31.2%). Subtyping F plasmids revealed five distinct replicons combinations, including F47:A-:B- (n = 2), F29:A-:B23 (n = 1), F29:A-:B- (n = 1), F18:A-B:- (n = 1), and F4:A-:B- (n = 1). The chloramphenicol resistance was significantly correlated with the other AMR phenotypes (p < 0.05). CONCLUSIONS AND RELEVANCE The meat ducks harbored MDR E. coli and played an important role in the environmental dissemination of AMR bacteria and its determinants. This confirms AMR as a health issue, highlighting the need for routine AMR monitoring and surveillance of meat ducks.
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Affiliation(s)
- Zulqarnain Baqar
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, China
- Research Unit for Microbial Food Safety and Antimicrobial Resistance, Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
- Center for Antimicrobial Resistance Monitoring in Food-borne Pathogens, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nuananong Sinwat
- Departments of Farm Resources and Production Medicine, Faculty of Veterinary Medicine, Kasetsart University, Nakhon Pathom 73140, Thailand
| | - Rangsiya Prathan
- Research Unit for Microbial Food Safety and Antimicrobial Resistance, Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
- Center for Antimicrobial Resistance Monitoring in Food-borne Pathogens, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Rungtip Chuanchuen
- Research Unit for Microbial Food Safety and Antimicrobial Resistance, Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
- Center for Antimicrobial Resistance Monitoring in Food-borne Pathogens, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand.
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Duran-Bedolla J, Téllez-Sosa J, Bocanegra-Ibarias P, Schilmann A, Bravo-Romero S, Reyna-Flores F, Villa-Reyes T, Barrios-Camacho H. Citrobacter spp. and Enterobacter spp. as reservoirs of carbapenemase blaNDM and blaKPC resistance genes in hospital wastewater. Appl Environ Microbiol 2024; 90:e0116524. [PMID: 39012101 PMCID: PMC11337798 DOI: 10.1128/aem.01165-24] [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: 06/13/2024] [Accepted: 06/20/2024] [Indexed: 07/17/2024] Open
Abstract
Antibiotic resistance has emerged as a global threat to public health, generating a growing interest in investigating the presence of antibiotic-resistant bacteria in environments influenced by anthropogenic activities. Wastewater treatment plants in hospital serve as significant reservoirs of antimicrobial-resistant bacteria, where a favorable environment is established, promoting the proliferation and transfer of resistance genes among different bacterial species. In our study, we isolated a total of 243 strains from 5 hospital wastewater sites in Mexico, belonging to 21 distinct Gram-negative bacterial species. The presence of β-lactamase was detected in 46.9% (114/243) of the isolates, which belonging to the Enterobacteriaceae family. We identified a total of 169 β-lactamase genes; blaTEM in 33.1%, blaCTX-M in 25.4%, blaKPC in 25.4%, blaNDM 8.8%, blaSHV in 5.3%, and blaOXA-48 in 1.1% distributed in 12 different bacteria species. Among the 114 of the isolates, 50.8% were found to harbor at least one carbapenemase and were discharged into the environment. The carbapenemase blaKPC was found in six Citrobacter spp. and E. coli, while blaNDM was detected in two distinct Enterobacter spp. and E. coli. Notably, blaNDM-1 was identified in a 110 Kb IncFII conjugative plasmid in E. cloacae, E. xiangfangensis, and E. coli within the same hospital wastewater. In conclusion, hospital wastewater showed the presence of Enterobacteriaceae carrying a high frequency of carbapenemase blaKPC and blaNDM. We propose that hospital wastewater serves as reservoirs for resistance mechanism within bacterial communities and creates an optimal environment for the exchange of this resistance mechanism among different bacterial strains. IMPORTANCE The significance of this study lies in its findings regarding the prevalence and diversity of antibiotic-resistant bacteria and genes identified in hospital wastewater in Mexico. The research underscores the urgent need for enhanced surveillance and prevention strategies to tackle the escalating challenge of antibiotic resistance, particularly evident through the elevated frequencies of carbapenemase genes such as blaKPC and blaNDM within the Enterobacteriaceae family. Moreover, the identification of these resistance genes on conjugative plasmids highlights the potential for widespread transmission via horizontal gene transfer. Understanding the mechanisms of antibiotic resistance in hospital wastewater is crucial for developing targeted interventions aimed at reducing transmission, thereby safeguarding public health and preserving the efficacy of antimicrobial therapies.
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Affiliation(s)
- Josefina Duran-Bedolla
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Cuernavaca, Morelos, Mexico
| | - Juan Téllez-Sosa
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Cuernavaca, Morelos, Mexico
| | - Paola Bocanegra-Ibarias
- Facultad de Medicina, Hospital Universitario "Dr. José Eleuterio González", Departamento de Enfermedades Infecciosas, Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Astrid Schilmann
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación en Salud Poblacional, Cuernavaca, Morelos, Mexico
| | - Sugey Bravo-Romero
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Cuernavaca, Morelos, Mexico
| | - Fernando Reyna-Flores
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Cuernavaca, Morelos, Mexico
| | - Tania Villa-Reyes
- Coordinación Nacional de la Red Hospitalaria de Vigilancia Epidemiológica, Dirección General de Epidemiología, Ciudad de México, Mexico
| | - Humberto Barrios-Camacho
- Instituto Nacional de Salud Pública (INSP), Centro de Investigación Sobre Enfermedades Infecciosas (CISEI), Cuernavaca, Morelos, Mexico
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Gholizadeh O, Ghaleh HEG, Tat M, Ranjbar R, Dorostkar R. The potential use of bacteriophages as antibacterial agents against Klebsiella pneumoniae. Virol J 2024; 21:191. [PMID: 39160541 PMCID: PMC11334591 DOI: 10.1186/s12985-024-02450-7] [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: 05/06/2024] [Accepted: 07/29/2024] [Indexed: 08/21/2024] Open
Abstract
One of the most common bacteria that cause nosocomial infections is Klebsiella pneumonia (K. pneumoniae), especially in patients who are very sick and admitted to the intensive care unit (ICU). The frequency of multi-drug-resistant Klebsiella pneumoniae (MDRKP) has dramatically increased worldwide in recent decades, posing an urgent threat to public health. The Western world's bacteriophage (phage) studies have been revitalized due to the increasing reports of antimicrobial resistance and the restricted development and discovery of new antibiotics. These factors have also spurred innovation in other scientific domains. The primary agent in phage treatment is an obligately lytic organism (called bacteriophage) that kills the corresponding bacterial host while sparing human cells and lessening the broader effects of antibiotic usage on commensal bacteria. Phage treatment is developing quickly, leading to many clinical studies and instances of life-saving medicinal use. In addition, phage treatment has a few immunological adverse effects and consequences in addition to its usefulness. Since K. pneumoniae antibiotic resistance has made treating multidrug-resistant (MDR) infections challenging, phage therapy (PT) has emerged as a novel therapeutic strategy. The effectiveness of phages has also been investigated in K. pneumoniae biofilms and animal infection models. Compared with antibiotics, PT exhibits numerous advantages, including a particular lysis spectrum, co-evolution with bacteria to avoid the emergence of phage resistance, and a higher abundance and diversity of phage resources than found in antibiotics. Moreover, phages are eliminated in the absence of a host bacterium, which makes them the only therapeutic agent that self-regulates at the sites of infection. Therefore, it is essential to pay attention to the role of PT in treating these infections. This study summarizes the state of knowledge on Klebsiella spp. phages and provides an outlook on the development of phage-based treatments that target K. pneumoniae in clinical trials.
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Affiliation(s)
- Omid Gholizadeh
- Student Research Committee, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Hadi Esmaeili Gouvarchin Ghaleh
- Applied Virology Research Center, Biomedicine Technologies Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mahdi Tat
- Applied Virology Research Center, Biomedicine Technologies Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Reza Ranjbar
- Molecular Biology Research Center, Biomedicine Technologies Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ruhollah Dorostkar
- Applied Virology Research Center, Biomedicine Technologies Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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He W, Russel J, Klincke F, Nesme J, Sørensen SJ. Insights into the ecology of the infant gut plasmidome. Nat Commun 2024; 15:6924. [PMID: 39138199 PMCID: PMC11322291 DOI: 10.1038/s41467-024-51398-3] [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: 03/01/2024] [Accepted: 08/05/2024] [Indexed: 08/15/2024] Open
Abstract
Plasmids are small DNA molecules that enable bacteria to share beneficial traits, influencing microbial communities. However, their role within the human gut microbiome remains largely unknown. In this study, we investigate the gut microbiomes of 34 mother-child cohorts, employing a plasmid analysis workflow to understand the impact of plasmids on the gut microbiome. We create a plasmid phylogenetic tree, devise a method for assigning plasmid hosts, and examine potential plasmid transfer networks. Our research discovers a wide variety of previously unidentified plasmid sequences, indicating that current databases do not fully represent the gut plasmidome. Interestingly, infants display greater plasmid diversity compared to mothers and other healthy adults. We find that Bacteroidota, a major bacterial phylum, serves as the primary host for gut plasmids and plays a dominant role in gut plasmid transfer events. Additionally, plasmids broaden the genetic capabilities of bacteria, with their influence on bacterial function becoming more apparent as children's gut microbiomes develop. This study sheds light on the role of plasmids in the infant gut microbiome, making a significant contribution to our understanding of plasmid biology.
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Affiliation(s)
- Wanli He
- Section of Microbiology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
| | - Jakob Russel
- Section of Microbiology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
| | - Franziska Klincke
- Section of Microbiology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark
| | - Joseph Nesme
- Section of Microbiology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark.
| | - Søren Johannes Sørensen
- Section of Microbiology, University of Copenhagen, Universitetsparken 15, DK-2100, Copenhagen, Denmark.
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Mattioni Marchetti V, Venturelli I, Cassetti T, Meschiari M, Migliavacca R, Bitar I. FosA3 emerging in clinical carbapenemase-producing C. freundii. Front Cell Infect Microbiol 2024; 14:1447933. [PMID: 39247055 PMCID: PMC11378647 DOI: 10.3389/fcimb.2024.1447933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/12/2024] [Indexed: 09/10/2024] Open
Abstract
Fosfomycin (FOS) is an effective antibiotic against multidrug-resistant Enterobacterales, but its effectiveness is reducing. Little is known on the current prevalence of FosA enzymes in low-risk pathogens, such as Citrobacter freundii. The aim of the study was the molecular characterization of a carbapenemase- and FosA-producing C. freundii collected in Italy. AK867, collected in 2023, showed an XDR profile, retaining susceptibility only to colistin. AK867 showed a FOS MIC >128 mg/L by ADM. Based on WGS, AK867 belonged to ST116 and owned a wide resistome, including fosA3, blaKPC-2, and blaVIM-1. fosA3 was carried by a conjugative pKPC-CAV1312 plasmid of 320,480 bp, on a novel composite transposon (12,907 bp). FosA3 transposon shared similarities with other fosA3-harboring pKPC-CAV1312 plasmids among Citrobacter spp. We report the first case of FosA3 production in clinical carbapenemase-producing C. freundii ST116. The incidence of FosA3 enzymes is increasing among Enterobacterales, affecting even low-virulence pathogens, as C. freundii.
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Affiliation(s)
- Vittoria Mattioni Marchetti
- Microbiology and Clinical Microbiology Unit, Scienze Clinico, Chirurgiche, Diagnostiche, Pediatriche (SCCDP) Department, University of Pavia, Pavia, Italy
| | - Irene Venturelli
- Clinical Microbiology, Azienda Unità Sanitaria Locale (AUSL) Modena, Modena, Italy
| | - Tiziana Cassetti
- Clinical Microbiology, Azienda Unità Sanitaria Locale (AUSL) Modena, Modena, Italy
| | - Marianna Meschiari
- Infectious Diseases Clinic, Azienda Ospedaliera Universitaria (AOU) Policlinico di Modena, Modena, Italy
| | - Roberta Migliavacca
- Microbiology and Clinical Microbiology Unit, Scienze Clinico, Chirurgiche, Diagnostiche, Pediatriche (SCCDP) Department, University of Pavia, Pavia, Italy
- I.R.C.C.S. Policlinico S. Matteo, Pavia, Italy
| | - Ibrahim Bitar
- Department of Microbiology, Faculty of Medicine, University Hospital in Pilsen, Charles University, Pilsen, Czechia
- Biomedical Center, Faculty of Medicine, Charles University, Pilsen, Czechia
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Das S, Mallick A, Barik M, Sarkar S, Saha P. The emergence of clonally diverse carbapenem-resistant Enterobacter cloacae complex in West Bengal, India: a dockyard of β-lactamases periling nosocomial infections. Int Microbiol 2024; 27:1023-1033. [PMID: 37985632 DOI: 10.1007/s10123-023-00451-0] [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: 07/07/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 11/22/2023]
Abstract
Carbapenem-resistant Enterobacter cloacae complex (CRECC) constitutes a global public health threat challenging clinical treatment and infection control, especially in low- and middle-income countries such as India. We analyzed the antimicrobial susceptibility, major β-lactamase genes, plasmid profiles, and genetic relatedness to understand the molecular epidemiology of CRECC clinical isolates (n = 44) in West Bengal, India, during 2021-2022. The majority (> 55%) of the isolates were resistant to fluoroquinolones, aminoglycosides, and co-trimoxazole, even > 20% for tigecycline and > 35% were extensively drug-resistant. Co-β-lactamase production was categorized into twenty-seven types, importantly NDM (84%), OXA-48 (40%), TEM (61%), CTX-M (46%), OXA-1 (55%), and MIR (27%). The NDM-1 and OXA-181 were major variants with the first observations of NDM-24 and -29 variants in India. Wide-range of plasmids (2 to > 212 kb) were harbored by the β-lactamase-producing isolates: small (91%), medium (27%), large (9%), and mega (71%). IncX3, ColE1, and HI2 were noted in about 30% of isolates, while IncF and R were carried by < 20% of isolates. The clonally diverse CRECC isolates were noted to cause cross-infections, especially at superficial site, bloodstream, and urinary-tract. This is the first molecular surveillance on CRECC in India. The study isolates serve as the dockyard of NDM, TEM, and CTX-M harboring a wide range of plasmids. The outcomes of the study may strengthen local and national policies for infection prevention and control practices, clarifying the genetic diversity among CRECC. Extensive genomic study may further intersect the relationships between these different plasmids, especially with their sizes, types, and antibiotic resistance markers.
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Affiliation(s)
- Surojit Das
- Department of Biomedical Laboratory Science and Management, Vidyasagar University, Midnapore, West Bengal, 721102, India.
| | - Abhi Mallick
- Department of Biomedical Laboratory Science and Management, Vidyasagar University, Midnapore, West Bengal, 721102, India
| | - Mili Barik
- Department of Biomedical Laboratory Science and Management, Vidyasagar University, Midnapore, West Bengal, 721102, India
| | - Soma Sarkar
- Department of Microbiology at Nil Ratan Sirkar Medical College Hospital, Kolkata, West Bengal, India
- Department of Microbiology at Infectious Diseases & Beleghata General Hospital, Kolkata, West Bengal, India
| | - Puranjoy Saha
- Department of Microbiology, Malda Medical College and Hospital, Malda, West Bengal, India
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Ammar AM, Abd El-Aziz NK, Aggour MG, Ahmad AAM, Abdelkhalek A, Muselin F, Smuleac L, Pascalau R, Attia FA. A Newly Incompatibility F Replicon Allele (FIB81) in Extensively Drug-Resistant Escherichia coli Isolated from Diseased Broilers. Int J Mol Sci 2024; 25:8347. [PMID: 39125914 PMCID: PMC11312129 DOI: 10.3390/ijms25158347] [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: 06/21/2024] [Revised: 07/16/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024] Open
Abstract
Multiple drug resistance (MDR) has gained pronounced attention among Enterobacterales. The transfer of multiple antimicrobial resistance genes, frequently carried on conjugative incompatibility F (IncF) plasmids and facilitating interspecies resistance transmission, has been linked to Salmonella spp. and E. coli in broilers. In Egypt, the growing resistance is exacerbated by the limited clinical efficacy of many antimicrobials. In this study, IncF groups were screened and characterized in drug-resistant Salmonella spp. and E. coli isolated from broilers. The antimicrobial resistance profile, PCR-based replicon typing of bacterial isolates pre- and post-plasmid curing, and IncF replicon allele sequence typing were investigated. Five isolates of E. coli (5/31; 16.13%) and Salmonella spp. (5/36; 13.89%) were pan-susceptible to the examined antimicrobial agents, and 85.07% of tested isolates were MDR and extensively drug-resistant (XDR). Twelve MDR and XDR E. coli and Salmonella spp. isolates were examined for the existence of IncF replicons (FII, FIA, and FIB). They shared resistance to ampicillin, ampicillin/sulbactam, amoxicillin/clavulanate, doxycycline, cefotaxime, and colistin. All isolates carried from one to two IncF replicons. The FII-FIA-FIB+ and FII-FIA+FIB- were the predominant replicon patterns. FIB was the most frequently detected replicon after plasmid curing. Three XDR E. coli isolates that were resistant to 12-14 antimicrobials carried a newly FIB replicon allele with four nucleotide substitutions: C99→A, G112→T, C113→T, and G114→A. These findings suggest that broilers are a significant reservoir of IncF replicons with highly divergent IncF-FIB plasmid incompatibility groups circulating among XDR Enterobacterales. Supporting these data with additional comprehensive epidemiological studies involving replicons other than the IncF can provide insights for implementing efficient policies to prevent the spreading of new replicons to humans.
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Affiliation(s)
- Ahmed M. Ammar
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt; (A.M.A.); (A.A.M.A.)
| | - Norhan K. Abd El-Aziz
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt; (A.M.A.); (A.A.M.A.)
| | | | - Adel A. M. Ahmad
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt; (A.M.A.); (A.A.M.A.)
| | - Adel Abdelkhalek
- Food Safety, Hygiene and Technology Department, Faculty of Veterinary Medicine, Badr University in Cairo (BUC), Badr 11829, Egypt;
| | - Florin Muselin
- Department of Toxicology, Faculty of Veterinary Medicine, University of Life Sciences “King Michael I” from Timisoara, 300645 Timisoara, Romania;
| | - Laura Smuleac
- Department of Sustainable Development and Environmental Engineering, Faculty of Agriculture, University of Life Sciences “King Mihai I” from Timisoara, 300645 Timisoara, Romania;
| | - Raul Pascalau
- Department of Agricultural Technologies, Faculty of Agriculture, University of Life Sciences “ King Mihai I” from Timisoara, 300645 Timisoara, Romania
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Liu H, Fan S, Zhang X, Yuan Y, Zhong W, Wang L, Wang C, Zhou Z, Zhang S, Geng Y, Peng G, Wang Y, Zhang K, Yan Q, Luo Y, Shi K, Zhong Z. Antibiotic-resistant characteristics and horizontal gene transfer ability analysis of extended-spectrum β-lactamase-producing Escherichia coli isolated from giant pandas. Front Vet Sci 2024; 11:1394814. [PMID: 39132438 PMCID: PMC11310934 DOI: 10.3389/fvets.2024.1394814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 05/09/2024] [Indexed: 08/13/2024] Open
Abstract
Extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (ESBL-EC) is regarded as one of the most important priority pathogens within the One Health interface. However, few studies have investigated the occurrence of ESBL-EC in giant pandas, along with their antibiotic-resistant characteristics and horizontal gene transfer abilities. In this study, we successfully identified 12 ESBL-EC strains (8.33%, 12/144) out of 144 E. coli strains which isolated from giant pandas. We further detected antibiotic resistance genes (ARGs), virulence-associated genes (VAGs) and mobile genetic elements (MGEs) among the 12 ESBL-EC strains, and the results showed that 13 ARGs and 11 VAGs were detected, of which bla CTX-M (100.00%, 12/12, with 5 variants observed) and papA (83.33%, 10/12) were the most prevalent, respectively. And ISEcp1 (66.67%, 8/12) and IS26 (66.67%, 8/12) were the predominant MGEs. Furthermore, horizontal gene transfer ability analysis of the 12 ESBL-EC showed that all bla CTX-M genes could be transferred by conjugative plasmids, indicating high horizontal gene transfer ability. In addition, ARGs of rmtB and sul2, VAGs of papA, fimC and ompT, MGEs of ISEcp1 and IS26 were all found to be co-transferred with bla CTX-M. Phylogenetic analysis clustered these ESBL-EC strains into group B2 (75.00%, 9/12), D (16.67%, 2/12), and B1 (8.33%, 1/12), and 10 sequence types (STs) were identified among 12 ESBL-EC (including ST48, ST127, ST206, ST354, ST648, ST1706, and four new STs). Our present study showed that ESBL-EC strains from captive giant pandas are reservoirs of ARGs, VAGs and MGEs that can co-transfer with bla CTX-M via plasmids. Transmissible ESBL-EC strains with high diversity of resistance and virulence elements are a potential threat to humans, animals and surrounding environment.
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Affiliation(s)
- Haifeng Liu
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Siping Fan
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | | | - Yu Yuan
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Wenhao Zhong
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Liqin Wang
- The Chengdu Zoo, Institute of Wild Animals, Chengdu, China
| | - Chengdong Wang
- China Conservation and Research Centre for the Giant Panda, Key Laboratory of SFGA on the Giant-Panda, Ya'an, Sichuan, China
| | - Ziyao Zhou
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Shaqiu Zhang
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Yi Geng
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Guangneng Peng
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Ya Wang
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Kun Zhang
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Qigui Yan
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Yan Luo
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
| | - Keyun Shi
- Jiangsu Yixing People’s Hospital, Yixing, China
| | - Zhijun Zhong
- College of Veterinary Medicine, Sichuan Agricultural University, Key Laboratory of Animal Disease and Human Health of Sichuan, Chengdu, China
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Markovska R, Stankova P, Popivanov G, Gergova I, Mihova K, Mutafchiyski V, Boyanova L. Emergence of blaNDM-5 and blaOXA-232 Positive Colistin- and Carbapenem-Resistant Klebsiella pneumoniae in a Bulgarian Hospital. Antibiotics (Basel) 2024; 13:677. [PMID: 39061359 PMCID: PMC11274196 DOI: 10.3390/antibiotics13070677] [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: 06/25/2024] [Revised: 07/10/2024] [Accepted: 07/18/2024] [Indexed: 07/28/2024] Open
Abstract
The rapid spread of carbapenemase-producing strains has led to increased levels of resistance among Gram-negative bacteria, especially enterobacteria. The current study aimed to collect and genetically characterize the colistin- and carbapenem-resistant isolates, obtained in one of the biggest hospitals (Military Medical Academy) in Sofia, Bulgaria. Clonal relatedness was detected by RAPD and MLST. Carbapenemases, ESBLs, and mgrB were investigated by PCR amplification and sequencing, replicon typing, and 16S rRNA methyltransferases with PCRs. Fourteen colistin- and carbapenem-resistant K. pneumoniae isolates were detected over five months. Six carbapenem-resistant and colistin-susceptible isolates were also included. The current work revealed a complete change in the spectrum of carbapenemases in Bulgaria. blaNDM-5 was the only NDM variant, and it was always combined with blaOXA-232. The coexistence of blaOXA-232 and blaNDM-5 was observed in 10/14 (72%) of colistin- and carbapenem-resistant K. pneumoniae isolates and three colistin-susceptible isolates. All blaNDM-5- and blaOXA-232-positive isolates belonged to the ST6260 (ST101-like) MLST type. They showed great mgrB variability and had a higher mortality rate. In addition, we observed blaOXA-232 ST14 isolates and KPC-2-producing ST101, ST16, and ST258 isolates. The colistin- and carbapenem-resistant isolates were susceptible only to cefiderocol for blaNDM-5- and blaOXA-232-positive isolates and to cefiderocol and ceftazidime/avibactam for blaOXA-232- or blaKPC-2-positive isolates. All blaOXA-232-positive isolates carried rmtB methylase and the colE replicon type. The extremely limited choice of appropriate treatment for patients infected with such isolates and their faster distribution highlight the need for urgent measures to control this situation.
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Affiliation(s)
- Rumyana Markovska
- Department of Medical Microbiology, Medical Faculty, Medical University of Sofia, 1431 Sofia, Bulgaria; (P.S.); (L.B.)
| | - Petya Stankova
- Department of Medical Microbiology, Medical Faculty, Medical University of Sofia, 1431 Sofia, Bulgaria; (P.S.); (L.B.)
| | - Georgi Popivanov
- Department of Surgery, Military Medical Academy, 1606 Sofia, Bulgaria; (G.P.); (V.M.)
| | - Ivanka Gergova
- Department of Microbiology and Virology, Military Medical Academy, 1606 Sofia, Bulgaria;
| | - Kalina Mihova
- Molecular Medicine Center, Medical University of Sofia, 1431 Sofia, Bulgaria;
| | | | - Lyudmila Boyanova
- Department of Medical Microbiology, Medical Faculty, Medical University of Sofia, 1431 Sofia, Bulgaria; (P.S.); (L.B.)
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Boff L, de Sousa Duarte H, Kraychete GB, Taddeucci-Rocha G, Oliveira BD, Albano RM, D'Alincourt Carvalho-Assef AP, Superti SV, Martins IS, Picão RC. Comparative analysis of the antimicrobial resistance and virulence traits in ESBL-producing-Klebsiella pneumoniae ST307 strains colonizing the gastrointestinal tract and causing a fatal bloodstream infection in a leukemia patient. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2024; 121:105598. [PMID: 38653335 DOI: 10.1016/j.meegid.2024.105598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/17/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
Klebsiella pneumoniae is an opportunistic pathogen that can colonize the gastrointestinal tract (GIT) of humans. The mechanisms underlying the successful translocation of this pathogen to cause extra-intestinal infections remain unknown, although virulence and antimicrobial resistance traits likely play significant roles in the establishment of infections. We investigated K. pneumoniae strains isolated from GIT colonization (strains Kp_FZcol-1, Kp_FZcol-2 and Kp_FZcro-1) and from a fatal bloodstream infection (strain Kp_HM-1) in a leukemia patient. All strains belonged to ST307, carried a transferable IncF plasmid containing the blaCTX-M-15 gene (pKPN3-307 TypeA-like plasmid) and showed a multidrug-resistance phenotype. Phylogenetic analysis demonstrated that Kp_HM-1 was more closely related to Kp_FZcro-1 than to the other colonizing strains. The Kp_FZcol-2 genome showed 81 % coverage with the Kp_HM-1 246,730 bp plasmid (pKp_HM-1), lacking most of its putative virulence genes. Searching public genomes with similar coverage, we observed the occurrence of this deletion in K. pneumoniae ST307 strains recovered from human colonization and infection in different countries. Our findings suggest that strains lacking the putative virulence genes found in the pKPN3-307 TypeA plasmid are still able to colonize and infect humans, highlighting the need to further investigate the role of these genes for the adaptation of K. pneumoniae ST307 in distinct human body sites.
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Affiliation(s)
- Luana Boff
- Laboratório de Investigação em Microbiologia Médica (LIMM), Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Humberlânia de Sousa Duarte
- Laboratório de Investigação em Microbiologia Médica (LIMM), Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gabriela Bergiante Kraychete
- Laboratório de Investigação em Microbiologia Médica (LIMM), Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gabriel Taddeucci-Rocha
- Laboratório de Investigação em Microbiologia Médica (LIMM), Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bianca Diniz Oliveira
- Hospital do Câncer I, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodolpho Mattos Albano
- Departamento de Bioquímica, Instituto de Biologia Roberto de Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Silvana Vargas Superti
- Hospital do Câncer I, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ianick Souto Martins
- Hospital do Câncer I, Instituto Nacional do Câncer (INCA), Rio de Janeiro, Rio de Janeiro, Brazil; Escola de Medicina, Universidade Federal Fluminense, Niterói, Brazil
| | - Renata Cristina Picão
- Laboratório de Investigação em Microbiologia Médica (LIMM), Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Departamento de Hidrobiologia, Universidade Federal de São Carlos, São Carlos, Brazil.
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