Emergence of two novel sequence types (3366 and 3367) NDM-1- and OXA-48-co-producing K. pneumoniae in Italy

  • Floriana Gona
  • Dafne Bongiorno
  • Ausilia Aprile
  • Erika Corazza
  • Betta Pasqua
  • Maria Grazia Scuderi
  • Matteo Chiacchiaretta
  • Daniela Maria Cirillo
  • Stefania Stefani
  • Maria Lina MezzatestaEmail author
Original Article


The aim of this study was to analyze the alarming spread of NDM-1- and OXA-48-co-producing Klebsiella pneumoniae clinical isolates, collected between October 2016 and January 2018 in a neonatal intensive care unit of the University Hospital, Catania, Italy, through whole genome sequencing. All confirmed carbapenem-resistant K. pneumoniae (CRKp) isolates were characterized pheno- and geno-typically, as well as by whole genome sequencing (WGS). A total of 13 CRKp isolates were identified from 13 patients. Pulsed-field gel electrophoresis (PFGE) was performed, and the multilocus sequence typing (MLST) scheme used was based on the gene sequence as published on the MLST Pasteur website. Core genome MLST (cgMLST) was also performed. All isolates co-carried blaoxa-48 and blaNDM-1 genes located on different plasmids belonging to the IncM/L and IncA/C2 groups, respectively. The 13 strains had identical PFGE profiles. MLST and cgMLST showed that K. pneumoniae was dominated by CRKp ST101 and two novel STs (ST3666 and ST3367), identified after submission to the MLST database for ST assignment. All isolates shared the same virulence factors such as type 3 fimbriae, genes for yersiniabactin biosynthesis, yersiniabactin receptor, and iron ABC transporter. They carried the wzi137 variant associated with the K17 serotype. To the best of our knowledge, this is the first report of two novel STs, 3366 and 3367, NDM-OXA-48-co-producing K. pneumoniae clinical isolates, in Italy.


ST3366 ST3367 ST101 NDM OXA-48 Carbapenemase K. pneumoniae 



The authors wish to thank the Scientific Bureau of the University of Catania for language support.


This work was supported by PRIN 2017 SFBFER.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Not applicable.

Informed consent

Not applicable.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Floriana Gona
    • 1
  • Dafne Bongiorno
    • 2
  • Ausilia Aprile
    • 2
  • Erika Corazza
    • 2
  • Betta Pasqua
    • 3
  • Maria Grazia Scuderi
    • 3
  • Matteo Chiacchiaretta
    • 1
  • Daniela Maria Cirillo
    • 1
  • Stefania Stefani
    • 2
  • Maria Lina Mezzatesta
    • 2
    Email author
  1. 1.Emerging Bacterial Pathogens Unit, Division of Immunology, Transplantation and Infectious DiseasesIRCCS San Raffaele Scientific InstituteMilanItaly
  2. 2.Department of Biomedical and Biotechnological Sciences, section of MicrobiologyUniversity of CataniaCataniaItaly
  3. 3.U.O. “Policlinico-Vittorio Emanuele G.Rodolico”CataniaItaly

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