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Wu T, Zou H, Xia H, Zhou Z, Zhao L, Meng M, Li Q, Guan Y, Li X. Genomic insight into transmission mechanisms of carbapenem-producing Citrobacter spp. isolates between the WWTP and connecting rivers. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 262:115150. [PMID: 37336090 DOI: 10.1016/j.ecoenv.2023.115150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/01/2023] [Accepted: 06/14/2023] [Indexed: 06/21/2023]
Abstract
Carbapenem-resistant Enterobacteriaceae (CRE) poses major health risks worldwide. Most studies have focused on carbapenem resistance in Klebsiella pneumoniae and Escherichia coli; however, the occurrence and transmission of carbapenem-resistant Citrobacter spp. (CRCS) are poorly understood. In this study, we investigated the occurrence and potential transmission patterns of CRCS in different functional areas of an urban wastewater treatment plant (WWTP) and connecting rivers during one-year monitoring in Shandong Province, China. In total, 14 CRCS were detected in 376 environmental samples, including those from the WWTP inlet (n = 7), WWTP anaerobic tank (n = 2), and rivers (n = 5). Citrobacter braakii (n = 6) was the dominant subtype among 14 CRCS isolates, followed by Citrobacter freundii (n = 5), Citrobacter sedlakii (n = 2), and Citrobacter werkmanii (n = 1). All CRCS were resistant to imipenem, meropenem, ampicillin, amoxicillin/clavulanic acid, cefotaxime, ceftazidime, trimethoprim/sulfamethoxazole, and ciprofloxacin. Plasmid analysis showed that the blaKPC-2 gene was located on IncN and IncFII (Yp) plasmids, whereas the blaNDM gene was located on IncX3 and IncN2 plasmids. Clonal transmission of CRCS harboring carbapenem genes occurred between the WWTP and connecting rivers on a temporal or spatial scale. High genomic relatedness of NDM-5-producing C. sedlakii was identified between river water and WWTP aerosol, suggesting a potential exposure risk of CRCS for workers and surrounding residents near the WWTP. Furthermore, NDM-5-producing C. sedlakii isolated from rivers was related to C. sedlakii isolated from soil and well water in different regions of China, indicating that NDM-5-producing C. sedlakii may be widespread in China. These findings indicate that rare healthcare-associated pathogens such as CRCS can contribute to widespread carbapenem production in the environment; thus, CRCS should be continuously monitored.
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Affiliation(s)
- Tianle Wu
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huiyun Zou
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Huiyu Xia
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Ziyu Zhou
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Ling Zhao
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Min Meng
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Qi Li
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Yanyu Guan
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xuewen Li
- Department of environment and health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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Bueris V, Sellera FP, Fuga B, Sano E, Carvalho MPN, Couto SCF, Moura Q, Lincopan N. Convergence of virulence and resistance in international clones of WHO critical priority enterobacterales isolated from Marine Bivalves. Sci Rep 2022; 12:5707. [PMID: 35383231 PMCID: PMC8983722 DOI: 10.1038/s41598-022-09598-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/24/2022] [Indexed: 11/09/2022] Open
Abstract
The global spread of critical-priority antimicrobial-resistant Enterobacterales by food is a public health problem. Wild-caught seafood are broadly consumed worldwide, but exposure to land-based pollution can favor their contamination by clinically relevant antimicrobial-resistant bacteria. As part of the Grand Challenges Explorations: New Approaches to Characterize the Global Burden of Antimicrobial Resistance Program, we performed genomic surveillance and cell culture-based virulence investigation of WHO critical priority Enterobacterales isolated from marine bivalves collected in the Atlantic Coast of South America. Broad-spectrum cephalosporin-resistant Klebsiella pneumoniae and Escherichia coli isolates were recovered from eight distinct geographical locations. These strains harbored blaCTX-M-type or blaCMY-type genes. Most of the surveyed genomes confirmed the convergence of wide virulome and resistome (i.e., antimicrobials, heavy metals, biocides, and pesticides resistance). We identified strains belonging to the international high-risk clones K. pneumoniae ST307 and E. coli ST131 carrying important virulence genes, whereas in vitro experiments confirmed the high virulence potential of these strains. Thermolabile and thermostable toxins were identified in some strains, and all of them were biofilm producers. These data point to an alarming presence of resistance and virulence genes in marine environments, which may favor horizontal gene transfer and the spread of these traits to other bacterial species.
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Affiliation(s)
- Vanessa Bueris
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil. .,Laboratory of Genetics, Butantan Institute, São Paulo, Brazil.
| | - Fábio P Sellera
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil.,School of Veterinary Medicine, Metropolitan University of Santos, Santos, Brazil.,One Health Brazilian Resistance Project (OneBR), São Paulo, Brazil
| | - Bruna Fuga
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,One Health Brazilian Resistance Project (OneBR), São Paulo, Brazil.,Department of Clinical Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Elder Sano
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,One Health Brazilian Resistance Project (OneBR), São Paulo, Brazil
| | - Marcelo P N Carvalho
- Department of Veterinary Clinic and Surgery, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Quézia Moura
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Nilton Lincopan
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil.,One Health Brazilian Resistance Project (OneBR), São Paulo, Brazil.,Department of Clinical Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Janssen L, de Almeida FM, Damasceno TAS, Baptista RDP, Pappas GJ, de Campos TA, Martins VDP. A Novel Multidrug Resistant, Non-Tn 4401 Genetic Element-Bearing, Strain of Klebsiella pneumoniae Isolated From an Urban Lake With Drinking and Recreational Water Reuse. Front Microbiol 2021; 12:732324. [PMID: 34899623 PMCID: PMC8654192 DOI: 10.3389/fmicb.2021.732324] [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: 06/28/2021] [Accepted: 11/01/2021] [Indexed: 11/13/2022] Open
Abstract
Antimicrobial resistance (AMR) is an increasing and urgent issue for human health worldwide, as it leads to the reduction of available antibiotics to treat bacterial infections, in turn increasing hospital stays and lethality. Therefore, the study and genomic surveillance of bacterial carriers of resistance in and outside of clinical settings is of utter importance. A colony of multidrug resistant (MDR) bacteria identified as Klebsiella spp., by 16S rDNA amplicon sequencing, has been isolated from an urban lake in Brazil, during a drug-degrading bacterial prospection. Genomic analyses revealed the bacteria as Klebsiella pneumoniae species. Furthermore, the in silico Multilocus Sequence Typing (MLST) identified the genome as a new sequence type, ST5236. The search for antimicrobial resistance genes (ARGs) detected the presence of genes against beta-lactams, fosfomycin, acriflavine and efflux pumps, as well as genes for heavy metal resistance. Of particular note, an extended-spectrum beta-lactamase gene (blaCTX-M-15) has been detected in close proximity to siphoviridae genes, while a carbapenemase gene (KPC-2) has been found in an extrachromosomal contig, within a novel non-Tn4401 genetic element (NTEKPC). An extrachromosomal contig found in the V3 isolate is identical to a contig of a K. pneumoniae isolate from a nearby hospital, which indicates a putative gene flow from the hospital network into Paranoá lake. The discovery of a MDR isolate in this lake is worrisome, as the region has recently undergone periods of water scarcity causing the lake, which receives treated wastewater effluent, and is already used for recreational purposes, to be used as an environmental buffer for drinking water reuse. Altogether, our results indicate an underrepresentation of environmental K. pneumoniae among available genomes, which may hamper the understanding of the population dynamics of the species in the environment and its consequences in the spread of ARGs and virulence genes.
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Affiliation(s)
- Luis Janssen
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Felipe Marques de Almeida
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | | | - Rodrigo de Paula Baptista
- Center for Tropical and Emerging Global Diseases, University of Georgia, Athens, GA, United States
- Institute of Bioinformatics, University of Georgia, Athens, GA, United States
| | - Georgios Joannis Pappas
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Tatiana Amabile de Campos
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
| | - Vicente de Paulo Martins
- Department of Cellular Biology, Institute of Biological Sciences, University of Brasilia, Brasília, Brazil
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