A 52-Year-Old Man Is Hospitalized Due to 2 Weeks of Low-Grade

A 52-year-old man is hospitalized due to 2 weeks of low-grade fever, malaise, anorexia, and fatigue.  The patient has a history of bicuspid aortic valve and underwent aortic valve replacement a year ago.  Physical examination reveals a new regurgitation murmur.  Blood cultures repeatedly grow gram-positive cocci in clusters, which are identified as Staphylococcus epidermidis.  This pathogen most likely demonstrates which of the following characteristics?

A) Alpha hemolysis
B) Mannitol fermentation
C) Negative catalase test
D) Negative coagulase test
E) Novobiocin resistance
F) Yellow pigment production

Correct Answer:

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