Localization of the Genus Rothia in the Oral Cavity

Abstract

Among the genus Rothia, R. dentocariosa and R. mucilaginosa have been isolated from the human oral cavity. Currently, we reported that new selective media were developed for the isolation of each species. The clinical efficacy of the genus Rothia was evaluated from samples of oral cavities, such as pit and fissure plaque, buccal surface plaque, the buccal membrane surface, the dorsum of tongue, gingival crevicular fluid (GCF), and the mucosal surface of denture base using these selective media. R. dentocariosa and R. mucilaginosa were detected in all sites from pit and fissure plaque, buccal surface plaque, the buccal membrane surface and the dorsum of tongue. Therefore, both Rothia species are common members of oral cavity. R. mucilaginosa was predominant at the dorsum of tongue with 28.15% to total streptococci. Results show that the dorsum of tongue is the main habitation area of R. mucilaginosa. R. dentocariosa and R. mucilaginosa were also detected in GCF. These bacteria were detected to a certain extent on the mucosal surface of denture base. Therefore, it seems that these bacteria are members of denture plaque.