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A 45 year old women with history of metastatic adenocarcinoma of the breast is admitted to the hosptial to have IV catheter placed for hte delivery of weekly chemotherapeutic drugs. Two weeks after the first treatment, she develops an unexplained fever. Subculture on blood agar grows gram positive nonhemolytic cocci in clusters. What additional properties would best identify the causal organism and why?

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The General Principles section of the USMLE covers these topics:
Biochemistry
Genetics
Microbiology
Pathology
Pharmacology


1. A 45 year old women with history of metastatic adenocarcinoma of the breast is admitted to the hosptial to have IV catheter placed for hte delivery of weekly chemotherapeutic drugs. Two weeks after the first treatment, she develops an unexplained fever. Subculture on blood agar grows gram positive nonhemolytic cocci in clusters. What additional properties would best identify the causal organism and why?





 
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