In this study, the presence of the mcr-1 gene in Escherichia coli from retail meat in Japan was investigated. Nine E. coli isolates (eight from chickens and one from pork) carried the mcr-1 gene on the plasmid. In six isolates from domestic chickens, mcr-1 was located on the IncI2 plasmid, which is approximately 60 kb in size. In the remaining three isolates from imported chicken and pork, mcr-1 was located on the IncX4 plasmid (30 kb).
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http://dx.doi.org/10.1111/1348-0421.12549 | DOI Listing |
Microorganisms
December 2024
Faculty of Veterinary Medicine, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, Bangladesh.
The irrational use of antimicrobials has led to the emergence of resistance, impacting not only pathogenic bacteria but also commensal bacteria. Resistance against colistin, a last-resort antibiotic, mediated by globally disseminated plasmid-borne mobile colistin resistance () genes, has raised significant global concerns. This cross-sectional study aimed to investigate the antimicrobial resistance patterns of colistin-resistant () and mobilised colistin resistance ( 1-5) genes from broiler meat.
View Article and Find Full Text PDFMicroorganisms
November 2024
Department of Microbiology, Faculty of Medicine, "Grigore T. Popa" University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iași, Romania.
Colistin resistance poses a significant clinical challenge, particularly in Gram-negative bacteria. This study investigates the occurrence of plasmid-mediated colistin resistance among isolates (, , and spp.) and non-fermentative rods ( and ).
View Article and Find Full Text PDFJ Glob Antimicrob Resist
January 2025
Institut National de la Santé et de la Recherche Médicale (UMR 1071), Institut National de la Recherche Agronomique (USC-2018), Université Clermont Auvergne, Clermont-Ferrand, France; Centre National de Référence de la Résistance aux Antibiotiques, Centre Hospitalier Universitaire, Clermont-Ferrand, France.
Background: Colistin is a last-line antibiotic used to treat severe human infections caused by carbapenemase-producing Gram-negative bacteria. In parallel, colistin has massively been used in the veterinary field so that mcr-1-positive E. coli have spread worldwide in livestock, potentially constituting a reservoir of colistin-resistant isolates that can be further transmitted to humans.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Via Ferrata 5, Pavia, Italy.
The global race against antimicrobial resistance requires novel antimicrobials that are not only effective in killing specific bacteria, but also minimize the emergence of new resistances. Recently, CRISPR/Cas-based antimicrobials were proposed to address killing specificity with encouraging results. However, the emergence of target sequence mutations triggered by Cas-cleavage was identified as an escape strategy, posing the risk of generating new antibiotic-resistance gene (ARG) variants.
View Article and Find Full Text PDFJ Infect Public Health
December 2024
Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address:
Background: Currently, antimicrobial agents are widely used in both animals and agriculture, causing the crisis of multidrug-resistant (MDR) bacteria. In this study we surveyed for 4 important antimicrobial-resistant bacteria: extended-spectrum β-lactamase (ESBL)-producing Escherichia coli, Klebsiella pneumoniae and Salmonella spp., and methicillin-resistant Staphylococcus aureus (MRSA) from the environment around chicken and pig farms.
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