title: Calcification of selected strains of Streptococcus mutans and Streptococcus sanguis.
abstract: Nine strains of cariogenic Streptococcus mutans and two strains of Streptococcus sanguis were tested for their ability to form hydroxyapatite. The cells were examined by X-ray diffraction and electron microscopy for apatite crystals after growth in a synthetic calcification medium. Each of the test isolates, except for one strain of S. sanguis, produced intracellular mineral. Two strains of S. mutans formed both intra- and extracellular crystals. There was no apparent relationship between calcifiability and serotype.
mesh_terms: D001031:Apatites / Q000096:biosynthesis; D003461:Crystallography; D002479:Inclusion Bodies / Q000648:ultrastructure*; D008854:Microscopy, Electron; D012703:Serotyping; D013045:Species Specificity; D013291:Streptococcus / Q000254:growth & development / Q000378:metabolism / Q000648:ultrastructure*; D014961:X-Ray Diffraction
chemical_list: D001031:Apatites