Abstract
Enzyme profiles of oral Treponema species were determined by using RapID-ANA (Innovative Diagnostic System, Atlanta, Ga.), a 4-h test system which detects 18 enzymatic reactions, including aminopeptidases and glycosidases. Seventy-two clinical isolates of Treponema denticola, four reference strains of T. denticola (ATCC 35404, ATCC 35405, ATCC 35520, and ATCC 33521), one strain of T. vincentii (ATCC 35580), and two strains of T. socranskii subspecies (T. socranskii subsp. buccale ATCC 35534 and T. socranskii subsp. socranskii ATCC 35536) were used in this study. All T. denticola strains produced indole and a variety of aminopeptidases and glycosidases. These organisms could be differentiated into two groups on the basis of tetrazolium reductase and serine, phenylalanine, and glycine aminopeptidase activities. T. vincentii produced N-acetylglucosaminidase and arginine aminopeptidase, which facilitated the differentiation of this organism from T. socranskii subspecies and the T. denticola group. T. socranskii subspecies gave positive reactions for alkaline phosphatase only. These findings suggest that the RapID-ANA system is useful for enzymatic characterization and differentiation of oral spirochetes.
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