Streptococcus s.b.e.: A Streptococcus Associated with Subacute Bacterial Endocarditis

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Abstract
A description of a hitherto unrecognized group of streptococci associated with subacute bacterial endocarditis is given. The streptococcus is of the viridans type, having a unique combination of physiological characteristics, including the ability to synthesize large amounts of a polysaccharide in a sucrose broth, to hydrolyze arginine, and to ferment inulin but not raffinose. The species name Streptococcus sanguis, suggested by White (1944), seems appropriate. This streptococcus was recovered from approx. 1/3 of the cases studies.