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RESEARCH REPORT |
1 The Forsyth Institute, 140 Fenway, Boston, MA 02115;
2 University of Washington, Department of Dental Public Health Sciences, Box 357475, and Department of Periodontics, Box 357480, Seattle, WA 98195-7475;
3 King Saud University, PO Box 85032, Riyadh 11691, Saudi Arabia; and
4 Department of Public Health Services, Box 409 CK, Saipan, Mariana Islands 96950;
*corresponding author, atanner{at}forsyth.org
This study determined the frequency with which 38 microbial species were detected in 171 randomly selected children from 6 to 36 months of age. Children were sampled and dental caries measured. Oral samples were assayed by means of a checkerboard DNA probe assay. The detection frequencies from tongue samples in children under 18 mos were: S. mutans 70%, S. sobrinus 72%, P. gingivalis 23%, B. forsythus 11%, and A. actinomycetemcomitans 30%, with similar detection frequencies in children over 18 mos. Thus, S. mutans and the periodontal pathogens, P. gingivalis and B. forsythus, were detected even in the youngest subjects. Species associated with caries included S. mutans (children ages 18-36 mos) and A. israelii (children ages < 18 mos), the latter species possibly reflecting increased plaque in children with caries. Species detection from tooth and tongue samples was highly associated, with most species detected more frequently from tongue than from tooth samples in children under 18 mos, suggesting that the tongue was a potential microbial reservoir.
KEY WORDS: Streptococcus mutans • Porphyromonas gingivalis • Actinomyces • Prevotella • pre-school children • dental caries • tongue samples
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