Enterococcus is any streptococcus that inhabits the intestinal tract.
a genus of gram-positive, round bacteria previously classified as members of the genus Streptococcus; some species cause infections in humans, especially in elderly or debilitated patients.
E. faecalis A species isolated from the human intestinal tract; it is a cause of subacute bacterial endocarditis.
E. faecium A species normally inhabiting the human intestinal tract; has been found in intra-abdominal abscesses and in infectious complications of liver and gallbladder surgery.