Abstract
Certain cases of endocarditis with prolonged course reported by Schottmiiller1 and Horder2 are similar clinically to those studied by Dr. F. Billings3 and myself,4 and the descriptions of the organisms isolated are very similar. Schottmiiller designates his organisms as mitior viridans, because they form long chains, are small in size, and produce green on blood-agar. He did not use inulin for differential tests, nor did he study the effects of animal passage. Horder names his organisms saprophytic streptococci on account of their lack of virulence and to distinguish them from Streptococcus pyogenes. The organisms studied by me appeared to be modified pneumococci, at least in most cases, and I now wish to present some of the results of a rather prolonged study of similar cocci from other cases of chronic infectious endocarditis.
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