Isolates of coagulase-negative Staphylococcus from urinary tract infections can be presumptively identified as S. saprophyticus on the basis of its:

a. penicillin susceptibility.
b. novobiocin resistance.
c. penicillin resistance.
d. novobiocin susceptibility.


B
Novobiocin resistance is a unique trait of S. saprophyticus, and testing for this trait is commonly used to identify this bacterium in the clinical setting.

Biology & Microbiology

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