A 26-Year-Old Man Comes to the Office Due to a 3-Day-History

A 26-year-old man comes to the office due to a 3-day-history of dysuria and urethral discharge.  The symptoms developed about 2 weeks after he had unprotected sexual intercourse with a new partner.  His temperature is 37.1 C (98.8 F) .  On physical examination, a mucoid discharge is expressed with gentle milking of the penis.  Gram stain of the discharge reveals numerous neutrophils with intracellular diplococci.  A sample of the discharge is placed on an antibiotic-containing medium, and bacterial colonies are cultured.  Which of the following terms best describes the medium?

A) Differential
B) Enrichment
C) Reducing
D) Selective
E) Synthetic

Correct Answer:

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