Female 13 Humans 13 Male child female 13 human 13 male 13 microbiology 13 Child 12 isolation and purification 8 Adolescent 7 Child, Preschool 7 adolescent 7 preschool child 7 Dental Caries 5 dental caries 5 Dental Plaque 4 Saliva 4 Streptococcus mutans 4 Young Adult 4 controlled study 4 randomized controlled trial 4 saliva 4 tooth plaque 4 young adult 4 Double-Blind Method 3 Polymerase Chain Reaction 3 adult 3 double blind procedure 3 nonhuman 3