抄録
Phosphoenolpyruvate (PEP)-dependent hydrolysis of o-nitrophenyl-β-D-galactoside (ONPG) was tested with toluene-treated whole cells of 15 staphylococcal strains which were positive in lactose fermentation. The results indicated that the PEP: lactose phosphotransferase system was present in all five strains of Staphylococcus epidermidis and a S. warneri strain as well as five strains of S. aureus, but probably absent in four S. saprophyticus strains. The ONPG-hydrolyzing system of the first three species was induced by lactose and galactose, while that of S. saprophyticus was induced only by lactose.
