Some physiological and toxigenic properties of members of the genus Micrococcus in relation to taxonomy

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Abstract
Postulation of the 2 genera Micrococcus and Staphylococcus is not yet warranted on a taxonomic basis since no scheme of consistent determinative properties of micrococci was described for positive recognition of distinctive groups of generic rank. Evidence points to pronounced genetic heterogeneity among the cocci. Variation in pigment production, occasionally reversible, is a question able basis for distinction between varieties of the sp. M. pyogenes Problems involved in utilization of the coagulase property and the phage-susceptibility property to distinguish pathogens from non-pathogens are discussed. Overlapping of characteristics of groups and spp. suggests restudy of existing schemes for distinguishing spp.

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