Characterization of a rare bla VIM-4 metallo-β-lactamase-producing Serratia marcescens clinical isolate in Hungary. 2020

Ákos Tóth, and Attila Makai, and Laura Jánvári, and Ivelina Damjanova, and Márió Gajdács, and Edit Urbán
Department of Bacteriology, Mycology and Parasitology, National Institute of Public Health, 1097, Albert Flórián út 2-6, Budapest, Hungary.

A carbapenem-resistant S. marcescens isolate was recovered from a patient with an inflammed pacemaker inplantation pocket from a Cardiac Surgery ward in a Hungarian University Hospital. Phenotypic tests and polymerase chain reaction (PCR) confirmed a very rare gene responsible for production of a carbapenemase ( ), which was further characterized by Sanger-sequencing. The characterization of this S. marcescens strain emphasizes the ongoing emergence of novel or rare carbapenemases. Strains expressing a weak carbapenemase like this strain might go unrecognized by routine diagnostics due to low minimum inhibitory concentrations (MICs) for the bacterial strains producing such enzymes.

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