Streptococcus caprae sp. nov., isolated from iberian ibex (Capra pyrenaica hispanica)

A. I. Vela, G. Mentaberre, S. Lavín, L. Domínguez, J. F. Fernández-Garayzábal

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)


© 2015 IUMS. Biochemical and molecular genetic studies were performed on a novel Gram-stain-positive, catalase-negative, coccus-shaped organism isolated from tonsil samples of two Iberian ibexes. The micro-organism was identified as a streptococcal species based on its cellular, morphological and biochemical characteristics. 16S rRNA gene sequence comparison studies confirmed its identification as a member of the genus Streptococcus, but the organism did not correspond to any species of this genus. The nearest phylogenetic relative of the unknown coccus from ibex was Streptococcus porci 2923-03T (96.6% 16S rRNA gene sequence similarity). Analysis based on rpoB and sodA gene sequences revealed sequence similarity values lower than 86.0 and 83.8%, respectively, from the type strains of recognized Streptococcus species. The novel bacterial isolate was distinguished from Streptococcus porci and other Streptococcus species using biochemical tests. Based on both phenotypic and phylogenetic findings, it is proposed that the unknown bacterium be classified as representing a novel species of the genus Streptococcus, for which the name Streptococcus caprae sp. nov. is proposed. The type strain is DICM07-02790-1CT (=CECT 8872T=CCUG 67170T).
Original languageEnglish
Article number000697
Pages (from-to)196-200
JournalInternational Journal of Systematic and Evolutionary Microbiology
Issue number1
Publication statusPublished - 1 Jan 2016


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