Pigment Production by Staphylococci

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Abstract
Summary: White variants, which were stable over many generations, were isolated from six of eight strains of Staphylococcus aureus by cultivation in fluid medium; their incidence was favoured by 0·5% (w/v) lithium chloride. These variants all resembled the parent culture from which they were derived in the production of free coagulase and α-lysin and, except for one which was non-typable, in bacteriophage type. None of the white variants, however, was clumped by plasma in a slide test, although the parent cultures were.

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