European dissemination of a single OXA-48-producing Klebsiella pneumoniae clone.

A Klebsiella pneumoniae isolate with decreased susceptibility to carbapenems was isolated in April 2011 in a hospital in Amsterdam (the Netherlands) and later found to be the source of an important outbreak in a Rotterdam hospital. The strain, belonging to sequence type (ST) 395, carried the bla(OXA-48) gene located onto a c 62-kb conjugative plasmid, together with the extended-spectrum β-lactamase gene bla(CTX-M-15) . It was closely related or identical to other OXA-48-positive Klebsiella pneumoniae isolates belonging to the same ST type and identified in France and Morocco. This study sheds light on the European dissemination of a single OXA-48 K. pneumoniae clone.