Extremely drug-resistant NDM-9-producing ST147 Klebsiella pneumoniae causing infections in Italy, May 2020

Author:

Falcone Marco12,Giordano Cesira31,Barnini Simona3,Tiseo Giusy2,Leonildi Alessandro3,Malacarne Paolo4,Menichetti Francesco2,Carattoli Alessandra5ORCID

Affiliation:

1. The authors contributed equally this article

2. Infectious Diseases Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy

3. Microbiology Unit, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy

4. Department of Anaesthesia and Critical Care Medicine, Azienda Ospedaliera Universitaria Pisana, Pisa, Italy

5. Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy

Abstract

A large outbreak of New Delhi metallo-beta-lactamase (NDM)-1-producing Klebsiella pneumoniae sequence type (ST) 147 occurred in Tuscany, Italy in 2018–2019. In 2020, ST147 NDM-9-producing K. pneumoniae were detected at the University Hospital of Pisa, Tuscany, in two critically ill patients; one developed bacteraemia. Genomic and phylogenetic analyses suggest relatedness of 2018–2019 and 2020 strains, with a change from NDM-1 to NDM-9 in the latter and evolution by colistin, tigecycline and fosfomycin resistance acquisition.

Publisher

European Centre for Disease Control and Prevention (ECDC)

Subject

Virology,Public Health, Environmental and Occupational Health,Epidemiology

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