A new biovar of Staphylococcus aureus subsp. aureus was isolated from human clinical specimens and described on the basis of studies of 12 isolates that were compared with 11 standard reference strains. Both DNA hybridization experiments and numerical taxonomy analysis demonstrated that these strains were strictly related to S. aureus subsp. aureus; however, they were significantly different from the latter. The atypical strains belonging to the new biovar can be distinguished from typical S. aureus subsp. aureus strains by their cx-chymotrypsin, ca-glucosidase, P-N-acetylglucosaminidase, lipase (C-14), and leucine arylamidase enzymatic activities and novobiocin resistance. Thus, the combination of a-glucosidase and 13-N-acetyl-glucosaminidase is more useful for distinguishing these S. aureus strains from the other, typical ones.
TWELVE ABERRANT STRAINS OF STAPHYLOCOCCUS AUREUS SUBSP. AUREUS FROM CLINICAL SPECIMENS.
CELLINI, Luigina;
1993-01-01
Abstract
A new biovar of Staphylococcus aureus subsp. aureus was isolated from human clinical specimens and described on the basis of studies of 12 isolates that were compared with 11 standard reference strains. Both DNA hybridization experiments and numerical taxonomy analysis demonstrated that these strains were strictly related to S. aureus subsp. aureus; however, they were significantly different from the latter. The atypical strains belonging to the new biovar can be distinguished from typical S. aureus subsp. aureus strains by their cx-chymotrypsin, ca-glucosidase, P-N-acetylglucosaminidase, lipase (C-14), and leucine arylamidase enzymatic activities and novobiocin resistance. Thus, the combination of a-glucosidase and 13-N-acetyl-glucosaminidase is more useful for distinguishing these S. aureus strains from the other, typical ones.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
