BIOTYPES OF STAPHYLOCOCCUS-EPIDERMIDIS AND MICROCOCCUS ORGANISMS, ISOLATED FROM INTRAMAMMARY INFECTIONS, RECLASSIFIED INTO SPECIES OF THE GENUS STAPHYLOCOCCUS (EPIDERMIDIS, HYICUS, XYLOSUS, AND SCIURI)

  • 1 January 1983
    • journal article
    • research article
    • Vol. 73  (2) , 109-116
Abstract
New methods for distinguishing the genera Staphylococcus and Micrococcus and for defining new species were used to reclassify organisms isolated from bovine intramammary infections. Organisms from a previous study were reclassified as follows: S. epidermidis B-P [Baird-Parker] subgroup II, proteinase group F strains of S. epidermidis; S. epidermidis B-P subgroup III, proteinase group B strains as S. hyicus ssp. chromogenes (pigmented) or ssp. hyicus (nonpigmented) and proteinase groups H and BH strains that were coagulase positive and nonpigmented as ssp. hyicus; B-P Micrococcus subgroup 6, proteinase group NR strains as S. xylosus and subgroup 6, proteinase group G strains as S. sciuri and S. xylosus. The reclassification of the strains increased the percentage of intramammary infections attributed to staphylococci from 62%, as first reported, to at least 86%.