Related Experiment Video
Updated: May 31, 2025
Intracranial Subarachnoidal Route of Infection for Investigating Roles of Streptococcus suis Biofilms in Meningitis in a Mouse Infection Model
Published on: July 1, 2018
Streptococcus suivaginalis sp. nov., Streptococcus iners sp. nov. and Streptococcus iners subsp. hyiners subsp. nov.
Tracy L Nicholson1, Keira L Stuart2, Darrell O Bayles1
1National Animal Disease Center, Agricultural Research Service, USDA, Ames, IA, USA.
Abstract:
Three novel strains within the genus Streptococcus (29887T, 29892T and 29896T) were isolated from healthy pigs during routine veterinary physical exams. All three strains were non-motile and non-spore-forming Gram-positive cocci. The complete genome of each strain was attained, and phylogenetic analyses were performed. Comparison of the genomes of 29887T, 29892T and 29896T to the genomes of other Streptococcus strains revealed digital DNA-DNA hybridization (dDDH) values between 21.2% and 53.9% and average nucleotide identity (ANI) values between 70.00% and 94.44%. Phylogenetic analyses suggested that each strain, 29896T (S. suivaginalis sp. nov.), 29887T (S. iners sp. nov.) and 29892T (S. iners subsp. hyiners subsp. nov.), may represent a novel species within the genus Streptococcus, while ANI analysis indicated that strains 29896T (S. suivaginalis sp. nov.) and 29887T (S. iners sp. nov.) represent novel species within the genus Streptococcus, and 29892T (S. iners subsp. hyiners subsp. nov.) represents a novel subspecies of 29887T (S. iners sp. nov.). Based upon the combined data presented in this study, two novel species, Streptococcus suivaginalis sp. nov. (type strain, 29896T=NRRL B-65677T=NCTC 14941T) and Streptococcus iners sp. nov. (type strain, 29887T=NRRL B-65675T=NCTC 14939T) are proposed, and one novel subspecies, Streptococcus iners subsp. hyiners subsp. nov. (type strain, 29892T=NRRL B-65676T=NCTC 14940T) is proposed.
