Streptococcus sanguinis is a normal feature of the human mouth, where this bacteria is found in dental plaque. S. sanguinis actually makes the mouth a healthier place, since it competes with other strains of Streptococcus that cause dental cavities.
S. sanguinis may colonise and infect other areas of the body, particularly heart valves after heart surgery, and is associated with bacterial vaginosis and genital tract infection.
