Streptococci causing dental caries:: (A) Streptococci equisimilis, (B) Streptococci mutans, (C) Streptococci pneumoniae, (D) Streptococci bovis
Answer is B. Ans. (b) Streptococci mutans S. mutans: It is member of viridans streptococci (a-hemolytic) which is pa of the normal flora of the oral cavity. It assumes bacillary form in acid environment. Can synthesize acid and large polysaccharide (adhesive dextran or levan) from sucrose.