C C Papagiannitsis1, E Malli2, Z Florou2, M Medvecky3, S Sarrou2, J Hrabak4, E Petinaki5. 1. Department of Microbiology, University Hospital of Larissa, Larissa, Greece; Biomedical Center, Faculty of Medicine and University Hospital in Plzen, Charles University, Plzen, Czech Republic. 2. Department of Microbiology, University Hospital of Larissa, Larissa, Greece. 3. Veterinary Research Institute, Brno, Czech Republic. 4. Biomedical Center, Faculty of Medicine and University Hospital in Plzen, Charles University, Plzen, Czech Republic. 5. Department of Microbiology, University Hospital of Larissa, Larissa, Greece. Electronic address: petinaki@med.uth.gr.
Abstract
OBJECTIVES: An Enterococcus faecium isolate (Efa-125) carrying both the vanA and vanB genes was recovered from a patient with bacteraemia treated in a Greek hospital. Since this is the first description in Europe of E. faecium carrying both vanA and vanB genes, the isolate was further studied. METHODS: Susceptibility to several antibiotics was determined using the VITEK®2 automated system. The isolate was typed by multilocus sequence typing (MLST). To define the genetic units of the vanA and vanB genes, the plasmid content of Efa-125 was analysed by pulsed-field gel electrophoresis (PFGE) of total DNA digested with S1 nuclease followed by hybridisation with digoxigenin-labelled vanA and vanB probes. In addition, plasmids and chromosomes were sequenced using the Illumina MiSeq platform. RESULTS: E. faecium Efa-125 belonged to ST117 and expressed resistance both to vancomycin and teicoplanin, with minimum inhibitory concentrations (MICs) for both of 256mg/L. The vanA gene was carried on a 29 320-bp plasmid exhibiting high similarity to pA6981 previously characterised from Enterococcus gallinarum A6981, whereas vanB was part of a Tn1549-like transposon integrated into the chromosome. Expression of the VanA phenotype was correlated with the presence of intact vanZ and vanS genes. CONCLUSIONS: This is the first detection in Greece of vanA-vanB genotype/VanA phenotype E. faecium and indicates an evolving epidemiology of vancomycin-resistant enterococci.
OBJECTIVES: An Enterococcus faecium isolate (Efa-125) carrying both the vanA and vanB genes was recovered from a patient with bacteraemia treated in a Greek hospital. Since this is the first description in Europe of E. faecium carrying both vanA and vanB genes, the isolate was further studied. METHODS: Susceptibility to several antibiotics was determined using the VITEK®2 automated system. The isolate was typed by multilocus sequence typing (MLST). To define the genetic units of the vanA and vanB genes, the plasmid content of Efa-125 was analysed by pulsed-field gel electrophoresis (PFGE) of total DNA digested with S1 nuclease followed by hybridisation with digoxigenin-labelled vanA and vanB probes. In addition, plasmids and chromosomes were sequenced using the Illumina MiSeq platform. RESULTS:E. faecium Efa-125 belonged to ST117 and expressed resistance both to vancomycin and teicoplanin, with minimum inhibitory concentrations (MICs) for both of 256mg/L. The vanA gene was carried on a 29 320-bp plasmid exhibiting high similarity to pA6981 previously characterised from Enterococcus gallinarum A6981, whereas vanB was part of a Tn1549-like transposon integrated into the chromosome. Expression of the VanA phenotype was correlated with the presence of intact vanZ and vanS genes. CONCLUSIONS: This is the first detection in Greece of vanA-vanB genotype/VanA phenotype E. faecium and indicates an evolving epidemiology of vancomycin-resistant enterococci.
Authors: Dan Alexandru Toc; Anca Livia Butiuc-Keul; Dumitrana Iordache; Alexandru Botan; Razvan Marian Mihaila; Carmen Anca Costache; Ioana Alina Colosi; Claudia Chiorean; Dan Stefan Neagoe; Liana Gheorghiu; Lia Monica Junie Journal: Biomedicines Date: 2022-05-12
Authors: Gustavo Henrique Rodrigues Vale de Macedo; Gabrielle Damasceno Evangelista Costa; Elane Rodrigues Oliveira; Glauciane Viera Damasceno; Juliana Silva Pereira Mendonça; Lucas Dos Santos Silva; Vitor Lopes Chagas; José Manuel Noguera Bazán; Amanda Silva Dos Santos Aliança; Rita de Cássia Mendonça de Miranda; Adrielle Zagmignan; Andrea de Souza Monteiro; Luís Cláudio Nascimento da Silva Journal: Pathogens Date: 2021-02-02