Existing phylogeny of Francisella tularensis subsp. holarctica. A) Single nucleotide polymorphism (SNP)–based phylogeny of F. tularensis subsp. holarctica derived from previous studies (5,6,8). Terminal subgroups representing sequenced strains are shown as stars, and intervening nodes representing collapsed branches are indicated by circles. Subclades within group B.13 are depicted in red. Isolates from Austria, Germany, Hungary, Italy, and Romania (n = 45) were assigned to existing subclades (b
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