FIG 1.

Phylogenomic tree based on the concatenated nucleotide sequence of core genes of Klebsiella species. Strains and their nucleotide accession numbers are listed alongside the species names. Species belonging to the K. oxytoca complex are in red, while other Klebsiella species are in blue. Raoultella species that were separated from Klebsiella 20 years ago (399) are included, while the genus Kluyvera, which is closely related to Klebsiella and Raoultella (400), is used as an outgroup. The tree was inferred by the core genome identification using PIRATE v1.0.4 (401) and subsequent phylogenetic inference using IQ-TREE v2.1.4 (402) using the GTR+G+ASC model with 10,000 rapid bootstraps. Branches with support over 70% are indicated by gradients. The bar shows nucleotide substitutions per site.