摘要: The simple method of culture human marrow 1 is well adapted for the evaluation therapeutic agents. It permits determination their effect on living cells, toxic dose and minimum effective dose, accurate control concentration. Sulfanilamide was chosen as first drug to be studied because its use relatively new, 2 mode action not thoroughly understood, 3 it has been suggested 4 that may directly blood cells rather than bacteria alone. All experiments which this article based are with infections beta hemolytic streptococcus. This organism study sulfanilamide shown an agent in 5 one most important agents producing disease. However, same general type