Facultatively anaerobic, Gram positive cocci, approximately 1 um in diameter, that grow in short or long chains in broth cultures. Carbohydrates are femented primarily to lactic acid and no gas. Catalase negative. Cell wall contains riitol teichoic acid and minimal rhamnose. Peptidoglycan type is Lys-direct. G+C content is 41 mol%.[2,3]
2 biovars of S. mitis differ biochemically and serologically [2,3]
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