Evaluating the expression pattern of oxacillinases (OXA) carbapenemases is essential to understand the prevalence and spread of carbapenem resistance . The aim of the study is to evaluate the presence of OXA carbapenemase genes and IS upstream to these genes in carbapenem-resistant clinical isolates. isolated from clinical samples were phenotypically identified and antibiotics sensitivity was performed. Multiplex polymerase chain reaction (PCR) was used to detect OXA51-like gene, OXA carbapenemases genes (OXA-23-like, OXA-24-like, and OXA-58-like), and IS in carbapenem-resistant isolates. Out of 55 isolates, 54 were confirmed as by PCR. -like gene was observed in 51 isolates of and none of the isolates showed the presence of -like and -like genes. Presence of IS upstream to OXA-23-like gene, OXA-51-like gene, and both OXA-51-like/OXA-23-like genes was observed in 51, 7, and 4 isolates, respectively. The genetic pattern of carbapenem-resistant isolated in this study was unique, which should be factored for clinical protocols to manage infections caused by emerging resistant strains of .
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http://dx.doi.org/10.1055/s-0041-1732809 | DOI Listing |
J Glob Antimicrob Resist
December 2024
Servicio Antimicrobianos, INEI-ANLIS ''Dr. Carlos G. Malbrán''. National and Regional Reference Laboratory for Antimicrobial Resistance (NRRLAR). Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Electronic address:
Background: The OXA-48-like enzymes are members of the class D β-lactamases, primarily detected in Enterobacterales, with the capacity to hydrolyze carbapenems. The allelic variant bla, which has low hydrolytic activity towards carbapenemes, was detected in Argentina in 2011 and spread successfully since then, giving sporadic origin to novel local variants.
Aim: To study the phenotypic profile and the dissemination strategies of two novel OXA enzymes, bla and bla, harbored in Escherichia coli M17224 and Klebsiella pneumoniae M21014, isolated from two pediatric patients.
J Family Med Prim Care
November 2024
Department of Surgery, UPUMS, Saifai, Etawah, Uttar Pradesh, India.
Introduction: commonly causes healthcare-associated infections and shows multidrug resistance. can produce biofilm. Carbapenem resistance in is due to the production of carbapenemases mainly.
View Article and Find Full Text PDFInfect Dis Now
December 2024
Texas Tech University School of Veterinary Medicine, Amarillo, TX 79106, USA. Electronic address:
Background: This study aimed to explore the distribution of beta-lactamase genes in Enterobacteriaceae from human clinical samples.
Methods: We analyzed data from 83 countries through the Antimicrobial Testing Leadership and Surveillance program, spanning 2004 to 2021. We calculated the proportion of each β-lactamase gene across nine bacterial species and generated a heatmap for β-lactamase genes with a frequency of ≥ 1 % in at least one species.
J Antimicrob Chemother
December 2024
Department of Microbiology and Instituto Biosanitario de Granada, University Hospital of Virgen de las Nieves, Avda. Fuerzas Armadas s/n, 18014 Granada, Spain.
Cefiderocol (FDC), a siderophore-cephalosporin conjugate, is the newest option for treating infection with carbapenem-resistant gram-negative bacteria. We identified a novel mechanism contributing to decreased FDC susceptibility in Klebsiella pneumoniae clinical isolates. The mechanism involves 2 coresident plasmids: pKpQIL, carrying variants of bla carbapenemase gene, and pKPN, carrying the ferric citrate transport (FEC) system.
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