1887

Abstract

Three Gram-positive, catalase-negative, coccus-shaped organisms were isolated from the oral cavities of bears. The isolates were tentatively identified as a streptococcal species based on the results of biochemical tests. Comparative 16S rRNA gene sequencing studies confirmed that the organisms were members of the genus , but they did not correspond to any recognized species of the genus. The nearest phylogenetic relative of the new isolates was ATCC 19645 (98.6 %), however, DNA–DNA hybridization analysis showed that the isolates displayed less than 15 % DNA–DNA relatedness with the type strain of Colonies of the novel strains grown on mitis salivarius agar showed an extracellular polysaccharide-producing colony morphology. Based on phenotypic and phylogenetic evidence, it is proposed that the novel isolates are classified in the genus as sp. nov. The type strain of is NUM 1615 (=JCM 16316=DSM 22768).

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2011-01-01
2019-10-16
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vol. , part 1, pp. 40 - 44

DNA–DNA hybridization values for sp. nov. with related streptococcal species. Phylogenetic tree based on 16S rRNA gene sequences constructed by the neighbour-joining method. Phylogenetic tree of members of streptococci closely related to strain NUM 1615 based on 16S rRNA gene sequences and constructed by maximum-parsimony analysis.

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