| actinomyces spp. in supragingival plaque of ethnic chinese preschool children with and without active dental caries. | very limited molecular epidemiological data are available on the role of actinomyces spp. in the pathogenesis of caries in the primary dentition. therefore, we investigated their distribution in supragingival plaque of ethnic chinese preschool children from singapore and hong kong, either with or without active caries. plaque samples were taken from intact interproximal enamel areas using dental floss. bacterial genomic dna of each sample was extracted and variable regions of 16s ribosomal dna a ... | 2003 | 12925831 |