General Information: Isolated from a human case of endocarditis associated with colon cancer in Caen, France in 2001. Streptococci are non-motile, Gram-positive cocci with widely varying pathogenic potential that occur in pairs or chains. Streptococcus gallolyticus (strain UCN34, biotype I) is a commensal Gram-positive bacterium isolated from various habitats, including feces of many animals and from human clinical sources. S. gallolyticus is part of the rumen flora but also a cause of disease in ruminants as well as in birds (septicemia in pigeons, outbreaks in broiler flocks, or bovine mastitis). This is a tannin-degrading Streptococcus species. Strains have been isolated from various habitats, including feces of many animals and from human clinical sources. This organism can be a cause of infectious endocarditis.