NCIt definition : A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the
phylum Firmicutes. This species is alpha hemolytic, alpha glucosidase and arginine
deaminase positive and negative for sialidase, urease, and catalase. It can ferment
lactose, and raffinose but not mannitol, sorbitol, or inulin. S. parasanguinis is
found in normal human oral and respiratory flora but is a pathogen that can cause
endocarditis if it colonizes the blood.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Streptococcus parasanguinis.;