The taxonomic problem of coagulase-positive staphylococci of various origins is confronted in the present investigation by means of the bacteriolytic activity pattern analysis. A total of 103 strains isolated from various animal sources have been examined using the same assay system which in previous studies had been employed with staphylococci of human origin and had permitted their subdivision into six lyogroups. Two groups ( and ) of coagulase-positive staphylococci have been recognized by this method. Group is shown to overlap exactly with the species , whereas group overlaps with the recently described species The results obtained are discussed, as related both to most recent data dealing with the taxonomy of coagulase-positive staphylococci and to previous findings on bacteriolytic activity patterns of staphylococci of human origin.


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