Rapid determination of novobiocin susceptibility for the identification of Staphylococcus saprophyticus.

In order to provide a rapid presumptive identification of Staphylococcus saprophyticus, the Autobac MTS was investigated as a method of determining susceptibility to low concentrations of novobiocin. Novobiocin-sensitive strains showed an LSI of greater than or equal to 0.6 and a zone size of greater than or equal to 16 mm on Mueller-Hinton agar; resistant strains showed an LSI of less than or equal to 0.6 and no zone of inhibition.