Abstract
Pneumococci and streptococci isolated from cases of erysipelas, measles, and scarlet fever were found very susceptible to the inhibitory and bactericidal action of sodium ricinoleate. Strep. lacticus, S. pyogenes, S. viridans, B. diphtheriae, and Bacillus tuberculosis were only slightly affected. S. fecalis, B. paratyphosus, B. dysenteriae, and B. coli communis were very resistant. A slight difference in susceptibility of various strains of streptococci of scarlet fever was noticed; pneumococci were dissolved.