Streptococcus agalactiae

**Semantic type:** Bacterium

**Definition:** A species of facultatively anaerobic, Gram positive, cocci shaped bacteria in the phylum Firmicutes. This species is positive for beta hemolysis, CAMP test, Lancefield group B and arginine deamination and negative for esculin hydrolysis, pyrrolidonylarylamidase and catalase. It can ferment trehalose and ribose but not mannitol or sorbitol. S. agalactiae is a commensal organism of the human gastrointestinal and female genital tracts and is a pathogen is humans causing opportunistic infections and neonatal sepsis.

**Synonyms:** - STREPT. GP B(AGALACT) - STREPTOCOCCUS AGALACTIAE - beta hemolytic streptococcus group B