Streptococcus Taonis Sp. Nov., a Novel Bacterial Species Isolated from a Blood Culture of a Patient

Overview

Journal Arch Microbiol

Specialty Microbiology

Date 2024 Mar 15

PMID 38489085

Authors

Chien-Yu Lee

Chin-Kan Chan

Momoko Chida

Mika Miyashita

Yun-Shien Lee

Hui-Chung Wu

Yu-Chung Chang

Wen-Ting Lin

Yi-Sheng Chen

Affiliations

Soon will be listed here.

Abstract

One Gram stain-positive, catalase-negative, α-hemolytic, chain-forming or paired cocci, designated ST22-14, was isolated from a blood culture of a child with suspected infection. The results of 16S rRNA gene sequences analyses showed that the most closely related species to strain ST22-14 were "Streptococcus vulneris" DM3B3 (99.2%), Streptococcus mitis NCTC 12261 (99.0%), "Streptococcus gwangjuense" ChDC B345, (99.0%), Streptococcus oralis subsp. dentisani 7747 (99.0%), Streptococcus downii CECT 9732 (99.0%), and Streptococcus infantis ATCC 700779 (98.9%). The genome of strain ST22-14 consists of 2,053,261 bp with a G + C content of 39.4%. Average nucleotide identity values between strain ST22-14 and Streptococcus mitis NCTC 12261 or other five species were from 82.2 to 88.0%. In silico DNA-DNA hybridization of ST22-14 showed an estimated DNA reassociation value of 34.6% with the closest species. The main cellular fatty acids of strain ST22-14 were 16:0, 18:0, 14:0, 18:1ω7c and 18:1ω6c. Based on these results, strain ST22-14 should be classified as a novel species of genus Streptococcus, for which the name Streptococcus taonis sp. nov. is proposed (type strain ST22-14 = NBRC 116002 = BCRC 81402).

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