Streptococcus parasanguinis

RANK: Species

TAXONOMY: Terrabacteria group -> Firmicutes -> Bacilli -> Lactobacillales -> Streptococcaceae -> Streptococcus -> Streptococcus parasanguinis


'Streptococcus parasanguinis' is a gram-positive bacteria of the genus Streptococcus that is classified as a member of the Streptococcus viridans group. S. parasanguinis is one of the major early colonizers of dental surfaces in the human oral cavity. Cell surface structures including pili and fimbriae allow the bacteria to adhere to oral surfaces. These adhesion molecules also play an important role in biofilm formation and promote aggregation with late tooth colonizers to form dental plaque. The presence of S. parasanguinis in the oral cavity is associated with a healthy microflora.Identified as a constituent of the oral microbiome by Human Oral Microbiome Database. Identified as constituent of vaginal microbiome. [PMID:23282177]

This species has been identified as a resident in the human gastrointestinal tract based on the phylogenetic framework of its small subunit ribosomal RNA gene sequences.[PMC 4262072]

Gut associated
Flora/ commensal
Oral microbiome
Vaginal microbiome
Client %
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Streptococcus parasanguinis