All are medically impoant streptococci except: (A) Streptococcus pyogenes, (B) Streptococcus agalactiae, (C) Streptococcus equisimilus, (D) Streptococcus salivarius
Answer is D. Streptococcus viridans is a miscellany of streptococci, normally resident in the mouth and upper respiratory tract. Based on sugar fermentation, cell wall composition and production of dextrans and levans, they have been classified into: S. mitis S. mutans S. salivarius S. sanguis Reference: Textbook of Microbiology; Anathanarayan and paniker&;s; 9th edition; Page no: 218