[Correlation of growth-phase and streptodornase-production of beta-hemolytic streptococci group A (author's transl)].

77 M- and 48 T-typed strains of A-streptococci were compared with respect to their extinction, acidification and nuclease-production as a function of the growth-time. Strains of the same serotype (M 12) showed a change in the distribution of the isoenzymes of nucleases with respect to the growth-time. Half of the strains produced nuclease activity after 4 h. Streptodornase B was produced by all strains. With the growth the number of the nucleases found at the same time diminished, after 96 h in 70% of the strains the nuclease activity was represented by streptodornase B only.