Five strains of a hitherto unknown -like bacterium were isolated from human clinical sources, including blood cultures. Biochemical and chemotaxonomic characterization indicated that the strains were distinct from previously described and species. A comparative 16S rRNA gene sequence analysis demonstrated that the undescribed strains constitute a new subline within the species complex. The closest known relative of the isolates was found to be , although a 16S rRNA sequence divergence value of approximately 6% clearly demonstrated that the unknown bacterium represents a distinct species. Based on the results of the present and earlier phylogenetic investigations, it is proposed that should be reclassified in a new genus, the genus , as comb. nov. In addition, a new species, , is proposed for the -like bacterium from human sources. The type strain of is CCUG 27420.


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