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Oelschlaeger P, Kaadan H, Dhungana R. Strategies to Name Metallo-β-Lactamases and Number Their Amino Acid Residues. Antibiotics (Basel) 2023; 12:1746. [PMID: 38136780 PMCID: PMC10740994 DOI: 10.3390/antibiotics12121746] [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: 10/31/2023] [Revised: 12/12/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Metallo-β-lactamases (MBLs), also known as class B β-lactamases (BBLs), are Zn(II)-containing enzymes able to inactivate a broad range of β-lactams, the most commonly used antibiotics, including life-saving carbapenems. They have been known for about six decades, yet they have only gained much attention as a clinical problem for about three decades. The naming conventions of these enzymes have changed over time and followed various strategies, sometimes leading to confusion. We are summarizing the naming strategies of the currently known MBLs. These enzymes are quite diverse on the amino acid sequence level but structurally similar. Problems trying to describe conserved residues, such as Zn(II) ligands and other catalytically important residues, which have different numbers in different sequences, have led to the establishment of a standard numbering scheme for BBLs. While well intended, the standard numbering scheme is not trivial and has not been applied consistently. We revisit this standard numbering scheme and suggest some strategies for how its implementation could be made more accessible to researchers. Standard numbering facilitates the comparison of different enzymes as well as their interaction with novel antibiotics and BBL inhibitors.
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Affiliation(s)
- Peter Oelschlaeger
- Department of Biotechnology and Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, CA 91766, USA; (H.K.)
| | - Heba Kaadan
- Department of Biotechnology and Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, CA 91766, USA; (H.K.)
| | - Rinku Dhungana
- Department of Biotechnology and Pharmaceutical Sciences, College of Pharmacy, Western University of Health Sciences, Pomona, CA 91766, USA; (H.K.)
- Department of Biological Sciences, Kenneth P. Dietrich School of Arts & Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
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Huang E, Yang X, Leighton E, Li X. Carbapenem resistance in the food supply chain. J Food Prot 2023; 86:100108. [PMID: 37244353 DOI: 10.1016/j.jfp.2023.100108] [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: 02/03/2023] [Revised: 05/18/2023] [Accepted: 05/22/2023] [Indexed: 05/29/2023]
Abstract
Carbapenems are critically important antibiotic agents because they are considered the "last-resort" antibiotics for treating serious infections. However, resistance to carbapenems is increasing throughout the world and has become an urgent problem. Some carbapenem-resistant bacteria are considered urgent threats by the United States Centers for Disease Control and Prevention. In this review, we searched and summarized studies published mostly in the recent five years related to carbapenem resistance in three main areas in the food supply chain: livestock, aquaculture, and fresh produce. We have found that many studies have shown a direct or indirect correlation between carbapenem resistance in the food supply chain and human infections. Our review also revealed the worrisome incidences of the cooccurrence of resistance to carbapenem and other "last-resort" antibiotics, such as colistin and/or tigecycline, in the food supply chain. Antibiotic resistance is a global public health challenge, and more effort related to carbapenem resistance in the food supply chain for different food commodities is still needed in some countries and regions, including the United States. In addition, antibiotic resistance in the food supply chain is a complicated issue. Based on the knowledge from current studies, only restricting the use of antibiotics in food animal production might not be enough. Additional research is needed to determine factors contributing to the introduction and persistence of carbapenem resistance in the food supply chain. Through this review, we hope to provide a better understanding of the current state of carbapenem resistance, and the niches of knowledge that are needed for developing strategies to mitigate antibiotic resistance, especially carbapenem resistance in the food supply chain.
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Affiliation(s)
- En Huang
- Department of Environmental Health Sciences, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, AR 72205, USA
| | - Xu Yang
- Department of Nutrition and Food Science, California State Polytechnic University Pomona, 3801 West Temple Ave, Pomona, CA 91768, USA
| | - Elizabeth Leighton
- Department of Microbiology, University of Wisconsin-La Crosse, 1725 State Street, La Crosse, WI 54601, USA
| | - Xinhui Li
- Department of Microbiology, University of Wisconsin-La Crosse, 1725 State Street, La Crosse, WI 54601, USA.
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Ramírez-Castillo FY, Guerrero-Barrera AL, Avelar-González FJ. An overview of carbapenem-resistant organisms from food-producing animals, seafood, aquaculture, companion animals, and wildlife. Front Vet Sci 2023; 10:1158588. [PMID: 37397005 PMCID: PMC10311504 DOI: 10.3389/fvets.2023.1158588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 05/23/2023] [Indexed: 07/04/2023] Open
Abstract
Carbapenem resistance (CR) is a major global health concern. CR is a growing challenge in clinical settings due to its rapid dissemination and low treatment options. The characterization of its molecular mechanisms and epidemiology are highly studied. Nevertheless, little is known about the spread of CR in food-producing animals, seafood, aquaculture, wildlife, their environment, or the health risks associated with CR in humans. In this review, we discuss the detection of carbapenem-resistant organisms and their mechanisms of action in pigs, cattle, poultry, seafood products, companion animals, and wildlife. We also pointed out the One Health approach as a strategy to attempt the emergency and dispersion of carbapenem-resistance in this sector and to determine the role of carbapenem-producing bacteria in animals among human public health risk. A higher occurrence of carbapenem enzymes in poultry and swine has been previously reported. Studies related to poultry have highlighted P. mirabilis, E. coli, and K. pneumoniae as NDM-5- and NDM-1-producing bacteria, which lead to carbapenem resistance. OXA-181, IMP-27, and VIM-1 have also been detected in pigs. Carbapenem resistance is rare in cattle. However, OXA- and NDM-producing bacteria, mainly E. coli and A. baumannii, are cattle's leading causes of carbapenem resistance. A high prevalence of carbapenem enzymes has been reported in wildlife and companion animals, suggesting their role in the cross-species transmission of carbapenem-resistant genes. Antibiotic-resistant organisms in aquatic environments should be considered because they may act as reservoirs for carbapenem-resistant genes. It is urgent to implement the One Health approach worldwide to make an effort to contain the dissemination of carbapenem resistance.
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Affiliation(s)
- Flor Y. Ramírez-Castillo
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Ags, Mexico
| | - Alma L. Guerrero-Barrera
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Ags, Mexico
| | - Francisco J. Avelar-González
- Laboratorio de Estudios Ambientales, Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Aguascalientes, Ags, Mexico
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Zheng Z, Xu Y, Ye L, Chan EWC, Chen S. Genomic insights into the emergence and spread of NDM-1-producing Vibrio spp. isolates in China. J Antimicrob Chemother 2022; 77:3039-3049. [PMID: 35978475 DOI: 10.1093/jac/dkac276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/19/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Carbapenemase-producing Vibrio spp., which exhibit an XDR phenotype, have become increasingly prevalent and pose a severe threat to public health. OBJECTIVES To investigate the genetic characteristics of NDM-1-producing Vibrio spp. isolates and the dissemination mechanisms of blaNDM-1 in Vibrio. METHODS A total of 1363 non-duplicate Vibrio spp. isolates collected from shrimp samples in China were subjected to antimicrobial susceptibility tests and screened for blaNDM-1. The blaNDM-1-positive isolates were further characterized by PFGE, MLST, conjugation and WGS using Illumina and Nanopore platforms. Plasmid stability and fitness cost were assessed using Escherichia coli J53, Klebsiella pneumoniae Kpt80 and Salmonella spp. SA2051 as recipient strains. RESULTS In total, 13 blaNDM-1-positive isolates were identified, all exhibiting MDR. WGS analysis revealed that the 13 blaNDM-1 genes were all associated with a derivative of Tn125. Plasmid analysis revealed that six blaNDM-1 genes were located in IncC plasmids and the other seven were carried by plasmids of two different novel types. Conjugation and plasmid stability assays showed that only the IncC plasmids could be transferred to all the recipient strains and could be stably maintained in the hosts. CONCLUSIONS The emergence of the novel plasmids has contributed to the variable genetic contexts of blaNDM-1 in Vibrio spp. and IncC plasmids harbouring the blaNDM-1 gene could facilitate the spread of such genes between Vibrio spp. and other zoonotic pathogens, leading to a rapid dissemination of blaNDM-1 in bacterial pathogens worldwide.
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Affiliation(s)
- Zhiwei Zheng
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Yating Xu
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Lianwei Ye
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Edward Wai Chi Chan
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong.,State Key Lab of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hum Hung, Hong Kong
| | - Sheng Chen
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
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Liu M, Zhang W, Hu Y, Chen P, Wang Z, Li R. Emergence of the cfr Gene in Vibrio diabolicus of Seafood Origin. Antimicrob Agents Chemother 2022; 66:e0181921. [PMID: 34780265 PMCID: PMC8765225 DOI: 10.1128/aac.01819-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/08/2021] [Indexed: 11/20/2022] Open
Abstract
The emergence and transmission of multidrug resistance (MDR) gene cfr have incurred great public health concerns worldwide. Recently, Gram-negative pathogens were found to carry cfr by various mobile elements. Here, we investigated a cfr-positive Vibrio diabolicus isolate by phenotyping and genomic analysis and found cfr in a translocatable structure (IS26-hp-cfr-IS26) among the MDR region in pNV27-cfr-208K, an emerging MDR plasmid in Vibrio species. This study highlights the necessity of surveillance of cfr in bacteria of diverse origins.
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Affiliation(s)
- Ming Liu
- Department of Marine Biology, College of Oceanography, Hohai University, Nanjing, P. R. China
| | - Wenhui Zhang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, P. R. China
| | - Yifan Hu
- Department of Marine Biology, College of Oceanography, Hohai University, Nanjing, P. R. China
| | - Pengyu Chen
- Department of Marine Biology, College of Oceanography, Hohai University, Nanjing, P. R. China
| | - Zhiqiang Wang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, P. R. China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, P. R. China
| | - Ruichao Li
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, P. R. China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, P. R. China
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