Streptococcus vulneris sp. nov., isolated from wound of patient with diabetic foot ulcer (DFU)

Jen hao Chung, Li Ting Wang, Yi Sheng Chen, Yun Shien Lee, Shih Ting Lin, Yu Chung Chang, Hui Chung Wu, Yu Jie Dai, Wei Qi Liao, Fan Ching Kao, Jui hsiang Li*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

5 Scopus citations

Abstract

A new α-haemolytic streptococcal strain, designated DM3B3T, was isolated from the wound of a diabetic foot ulcer (DFU) patient. Phylogenetic analysis based on 16S rRNA full-gene sequencing (1563 bp) revealed highest sequence similarity to Streptococcus mitis (99.7%), followed by “Streptococcus gwangjuense” (99.6%), and Streptococcus pseudopneumoniae (99.5%). Comparison of five housekeeping genes, groEL, rpoB, sodA, recA and pheS, revealed that strain DM3B3T was well separated from the Streptococcus reference strains. The complete genome of strain DM3B3T consisted of 1,963,039 bp with a G + C content of 41.0 mol%. Average nucleotide identity values between strain DM3B3T and Streptococcus mitis NCTC 12261T, “Streptococcus gwangjuense” ChDC B345T, and Streptococcus pseudopneumoniae ATCC BAA-960T were 93.8%, 94.4%, and 92.2%, respectively. The highest digital DNA-DNA hybridization value with respect to the closest species was 57.5%, i.e., below the species cut-off of 70% hybridization. The main cellular fatty acids of strain DM3B3T were 16:0, 18:1ω7c, 18:1ω9c and 18:0. On the basis of phylogenetic, genotypic and phenotypic data, we propose to classify this isolate as representative of a novel species of the genus Streptococcus, Streptococcus vulneris sp. nov., in reference to its isolation from wound, with strain DM3B3T (= NBRC 114638T = BCRC 81288T) as the type strain.

Original languageEnglish
Article number359
JournalArchives of Microbiology
Volume204
Issue number7
DOIs
StatePublished - 07 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

  • Diabetic foot ulcer
  • Streptococcus vulneris
  • Wound

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