Hospitalized patients with weak immunity are at a great risk of "Enterococcal" infections due to prolonged use of antibiotics. "Enterococci" cause 10-15% of the infections transmitted  in a hospital that occur in the urinary tract, intra-abdomen and in the bloodstream. Among Enterococci, "Enterococcus faecalis" and "Enterococcus faecium" are the most common causative agents of human infections.