Two isolates harbouring three carbapenemase genes each, were isolated from two patients from different ICUs at University Hospital Centre Zagreb, Croatia, which is to our knowledge, the first report of triple carbapenemase (, , and co-existence in strains and also among Enterobacterales members in Croatia. Antimicrobial susceptibility testing showed susceptibility only to colistin and amikacin. The production of carbapenemases was phenotypically tested by immunochromatographic assay and confirmed by PCR. Detailed analysis by Whole Genome Sequencing (WGS) of short reads by Illumina and long reads by Oxford Nanopore Technologies (ONT) was additionally performed and showed that both isolates belonged to ST200. They were separated by 98 Single Nucleotide Polymorphisms (SNPs) having variations in the number of genes on the chromosome, the number of genes on the plasmid, non-identical plasmids, different plasmid content in general, and only one isolate carried a 94 kb prophage.
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http://dx.doi.org/10.1080/1120009X.2024.2354107 | DOI Listing |
J Antimicrob Chemother
December 2024
Division of Infectious Diseases, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 06351, South Korea.
Background: Our research aimed to investigate the potential of in vitro triple antimicrobial synergism against carbapenem-resistant Pseudomonas aeruginosa (CRPA) as a strategy to overcome antimicrobial resistance.
Methods: We used 12 CRPA blood isolates stocked in the Asian Bacterial Bank between 2016 and 2018. All isolates were tested by multi-locus sequencing and carbapenemase multiplex PCR.
BMC Infect Dis
December 2024
Laboratoire de Biotechnologie des Molécules Bioactives et de la Physiopathologie Cellulaire (LBMBPC), Faculté des sciences de la Nature et de la vie, Université Batna 2, Batna, Algérie.
Background: Carbapenemase-producing Enterobacterales isolates are associated with significant mortality and have emerged as a major problem in healthcare settings worldwide.
Objective: Our aim was to investigate the epidemiological and genotypic characteristics of carbapenemase-positive Enterobacterales isolates from patients hospitalised in three hospitals in the city of Batna, Algeria.
Methods: Between 2016 and 2019, a total of 5,316 clinical isolates were obtained.
Antimicrob Agents Chemother
September 2024
David Braley Centre for Antibiotic Discovery, McMaster University, Hamilton, Ontario, Canada.
The effectiveness of β-lactam antibiotics is increasingly threatened by resistant bacteria that harbor hydrolytic β-lactamase enzymes. Depending on the class of β-lactamase present, β-lactam hydrolysis can occur through one of two general molecular mechanisms. Metallo-β-lactamases (MBLs) require active site Zn ions, whereas serine-β-lactamases (SBLs) deploy a catalytic serine residue.
View Article and Find Full Text PDFJ Chemother
May 2024
Department of Clinical Microbiology, Infection Prevention and Control, University Hospital Center, Zagreb, Croatia.
Two isolates harbouring three carbapenemase genes each, were isolated from two patients from different ICUs at University Hospital Centre Zagreb, Croatia, which is to our knowledge, the first report of triple carbapenemase (, , and co-existence in strains and also among Enterobacterales members in Croatia. Antimicrobial susceptibility testing showed susceptibility only to colistin and amikacin. The production of carbapenemases was phenotypically tested by immunochromatographic assay and confirmed by PCR.
View Article and Find Full Text PDFJ Clin Lab Anal
April 2024
Departmento de Microbiología, Facultad de Medicina, Universidad de Granada-Instituto de Investigación Biosanitaria, Granada, Spain.
Background: Infections by glucose-nonfermenting gram-negative bacilli (NFGNB) pose a major public health problem due to multiresistance to beta-lactam antibiotics, especially plasmid-borne carbapenemases. Their detection by microbiology laboratories is challenging, and there is a need for easy-to-use and reliable diagnostic techniques. Our objective was to evaluate an in-house screening method to presumptively detect carbapenemases in NFGNB in a simple and clinically useful manner.
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