... mitis, Streptococcus gordonii, Streptococcus sanguis v Streptococcus parasanguis Nhúm salivarius: Streptococcus salivvarius v Streptococcus vestibularis Nhúm mutans: Streptococcus mutans v Streptococcus ... ca Streptococcus mutans i vi vic phõn lp v nhn dng Trờn th gii ó cú nhiu nghiờn cu tỡm hiu v S mutans v nhiu chng chun ó c cụng b, nghiờn cu nh S mutans GS-5, S mutans UA-159, S mutans AHT, S mutans ... thut PCR vi cp mi c hiu ca gen dextranse ca Streptococcus mutans 95 3.4.4 Mt s c im sinh lý ca chng vi khun Streptococcus mutans H1, H2 v H3 96 3.4.4.1 Kh nng sinh axit ca S mutans H1, S mutans...