title: Plaque formation in vitro by Actinomyces viscosus in the presence of Streptococcus sanguis or Streptococcus mutans.
abstract: Actinomyces viscosus, growing on a tooth in the presence of sucrose, slowly produced a loosely-attached plaque, the pH being 6.1 after 120 h. When the tooth was inoculated simultaneously with A. viscosus and either Streptococcus sanguis or Streptococcus mutans, firmly-adherent plaque was quickly formed and the pH fell below 5 after 33 h with the former Streptococcus and 24 h with the latter. A. viscosus disappeared from each mixed plaque by 120 h.
mesh_terms: D000190:Actinomyces / Q000254:growth & development*; D000898:Antibiosis; D003773:Dental Plaque / Q000382:microbiology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D013045:Species Specificity; D013295:Streptococcus mutans / Q000254:growth & development*; D013298:Streptococcus sanguis / Q000254:growth & development*