NDM-1 producing Klebsiella pneumoniae isolates, Berlin, Germany

This study investigated a potential NDM-1 plasmid outbreak across multiple hospital sites by analyzing 57 Klebsiella pneumoniae isolates at both the clonal and plasmid levels. Plasmid analysis identified clone-specific NDM-1 plasmids that closely matched with the core genome MLST outbreak clusters, and ruled out a multi-site NDM-1 plasmid outbreak across four different hospital sites.