Streptococcus danieliae sp. nov., a novel bacterium isolated from the caecum of a mouse

Thomas Clavel, Cédric Charrier, Dirk Haller

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We report the characterization of one novel bacterium, strain ERD01G T, isolated from the cecum of a TNFdeltaARE mouse. The strain was found to belong to the genus Streptococcus based on phylogenetic analysis of partial 16S rRNA gene sequences. The bacterial species with standing name in nomenclature that was most closely related to our isolate was Streptococcus alactolyticus (97 %). The two bacteria were characterized by a DNADNA hybridization similarity value of 35 %, demonstrating that they belong to different species. The new isolate was negative for acetoin production, esculin hydrolysis, urease, α-galactosidase and β-glucosidase, was able to produce acid from starch and trehalose, grew as betahemolytic coccobacilli on blood agar, did not grow at >40 °C, did not survive heat treatment at 60 °C for 20 min and showed negative agglutination in Lancefield tests. On the basis of these characteristics, strain ERD01GT differed from the most closely related species S. alactolyticus, Streptococcus gordonii, Streptococcus intermedius and Streptococcus sanguinis. Thus, based on genotypic and phenotypic evidence, we propose that the isolate belongs to a novel bacterial taxon within the genus Streptococcus, for which the name Streptococcus danieliae is proposed. The type strain is ERD01GT (= DSM 22233T - CCUG 57647T).

Original languageEnglish
Pages (from-to)43-49
Number of pages7
JournalArchives of Microbiology
Volume195
Issue number1
DOIs
StatePublished - Jan 2013

Keywords

  • Bacterial culture
  • Crohn's disease-like ileitis
  • Intestinal microbiota
  • Streptococcus
  • TNF mice

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