Streptococcus infantarius

**Semantic type:** Bacterium

**Definition:** A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the phylum Firmicutes. This species is positive for esculin hydrolysis, alpha galactosidase and Lancefield group D and negative for catalase, arginine deaminase, growth in 6.5% NaCl, pyrrolidonylarylamidase and urease. It can ferment melibiose, lactose and sucrose but not mannitol, sorbitol, inulin or trehalose. S infantarius has been isolated from infants and is a human pathogen that can cause hepatobiliary bacteremia.

**Synonyms:** - STREPTOCOCCUS INFANTARIUS