Streptococci causing dental caries:
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.
Streptococci equisimilis
Streptococci mutans
Streptococci pneumoniae
Streptococci bovis