Calcification of selected strains of Streptococcus mutans and Streptococcus sanguis

Abstract

Nine strains of cariogenic Streptococcus mutans and 2 strains of Streptococcus sanguis were tested for their ability to form hydroxyapatite. The cells were examined by Xray 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. mutants formed both intra and extracellular crystals. There was no apparent relationship between calcifiability and serotype.