Abstract
Conclusions
In conclusion, our results would indicate that, (a) pneumococci of all serological groups, under certain cultural conditions, may hemolyze human erythrocytes, and, (b) apparently, this property is not influenced by the reaction of the medium within the growth limits of the organisms, nor (c) by prolonged refrigeration of the developed colonies on bloodagar plates. (d) Probably the hemolysin is an intracellular product liberated from autolyzed organisms which diffuse from the colony into the surrounding blood agar.
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