NCIt definition : A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the
phylum Firmicutes. This species is alpha hemolytic, arginine deaminase positive, hydrolysis
esculin, and urease and catalase negative. It can ferment inulin and trehalose but
not mannitol, sorbitol, or raffinose. S. sanguinis is found in the normal oral flora
of humans and is a pathogen that can cause dental caries, and endocarditis after dental
injury.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Streptococcus sanguinis.;