11. Microaerophilic and other streptococci are also often isolated. 12. This led to the discovery that streptococci were able to produce multiple isozymes of DNase. 13. In fact, all strains of Group D Streptococci hydrolyze �sculin in 40 % bile. 14. Specifically, streptococci can cause varying levels of infections from mild to life-threatening. 15. These products contain bacteria from 4 generas : Lactobacillus, Lactococcus, Bifidumbacteria, Streptococci . 16. Group A streptococci were the major cause of serious infections in newborns and mothers before 1940. 17. In direct smears, they may be coccoid, so they can be mistaken for streptococci . 18. Streptococci represent 20 % of the oral bacteria and actually determine the development of the biofilms.19. The chal contained streptococci and yeast. 20. The Prontosil form of sulfa was introduced in 1935 ., and was effective against streptococci .