A 22-Year-Old Woman Participates in a Research Study

A 22-year-old woman participates in a research study.  She is asymptomatic and has not had a respiratory illness in the last 8 weeks.  She reports no chronic medical problems and takes no medications.  A nasopharyngeal specimen is obtained and cultured on a selective medium containing vancomycin, colistin, nystatin, and trimethoprim.  The organism most likely to be isolated is typically associated with which of the following conditions?

A) Cystitis
B) Dental caries
C) Diphtheria
D) Meningitis
E) Otitis media
F) Pneumonia
G) Rheumatic heart disease

Correct Answer:

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