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Streptococcus xiaochunlingii sp. nov. E24 Isolated From the Oropharynx of Healthy Chinese Children.

ABSTRACT: A Gram-positive, α-hemolytic, catalase-negative, facultative anaerobic and non-motile coccus was isolated form throat swabs taken from the oropharynx of healthy children. The genome was shown to be 1.950,659 bp long and contained 42.03 mol% G + C bases with 1,942 protein-coding and 53 RNA coding genes. The results of 16S rRNA gene sequencing strongly suggested that the strain is a member of the Streptococcus genus, with 98.04, 98.11, and 97.34% similarities to Streptococcus australis ATCC 700641^T, Streptococcus rubneri LMG 27207^T and Streptococcus parasanguinis ATCC 15912^T, respectively. A sodA gene comparison exhibited a sequence identity of 92.6% with the closest strain Streptococcus australis ATCC 700641^T. In silico DNA-DNA hybridization showed a highest DNA similarity value of 52% with Streptococcus australis ATCC 700641^T. Comparing 18 biochemical traits, the similarities of the Streptococcus strain E24 were 72% with Streptococcus rubneri LMG 27207^T, 78% with Streptococcus australis ATCC 700641^T and 44% with Streptococcus parasanguinis ATCC 15912^T. We suggest that based on the genotypic and phenotypic results that the strain E24 is a novel species of the Streptococcus genus and propose the name Streptococcus xiaochunlingii sp. nov. E24.

SUBMITTER: Zou Y

PROVIDER: S-EPMC7550633 | biostudies-literature |

REPOSITORIES: biostudies-literature

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