Streptococcus viridans is a type of bacteria commonly found in the human mouth, throat, and gastrointestinal tract. It is a normal part of the human microbiota and is usually harmless. However, in some cases, Streptococcus viridans can cause infections, especially in individuals with weakened immune systems or underlying health conditions. These infections can range from mild, such as dental caries, to more serious, such as endocarditis, a potentially life-threatening infection of the heart valves.
