Abstract
The phylogenetic position of the obligate fish pathogenic Gram-positive eubacterium Renibacterium salmoninarum was determined by the 16S ribosomal RNA cataloguing approach. Comparison of the catalogue to those of more than 165 Gram-positive organisms from 50 genera revealed that R. salmoninarum is a member of the actinomycetes subdivision. As derived from similarity coefficients (SAB values), this organism is related to a subgroup harbouring morphologically and chemotaxonomically rather heterogeneous taxa, including Anthrobacter, Micrococcus, Cellulomonas, Jonesia, Promicromonospora, Stomatococcus and Brevibacterium. Thus, the inclusion of organisms characterized by regular rods increases the phenotypic variability of this phylogenetically coherent group.
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