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Morphological, Biochemical, and Serological Characterization of Rothia dentocariosa

Department of Microbiology, West Virginia University School of Medicine, Morgantown, West Virginia 26506

ABSTRACT

Fifty strains of Rothia dentocariosa Georg and Brown were characterized morphologically, biochemically, and serologically. All strains had characteristics agreeing with previous morphological descriptions of this organism, although there was greater biochemical and serological strain variation than previously reported. Four biotypes were established on the basis of variability in reduction of nitrite, production of urease, hydrolysis of esculin, and formation of acid from lactose, mannitol, mannose, raffinose, rhamnose, salicin, and trehalose. Three serotypes and a group of fluorescent antibody-negative strains were identified on the basis of the fluorescent antibody technique. A relationship between the four biotypes and the three serotypes was established.

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