Test_Prep
USMLE · Question #499
A sexually active 23-year-old man with multiple sex partners has dysuria and a yellow urethral exudate. Gram stain of the exudate shows numerous neutrophils, many that contain intracellular gram-negat
The correct answer is A. Antigenic variation. See the full explanation below for the reasoning.
Question
A sexually active 23-year-old man with multiple sex partners has dysuria and a yellow urethral exudate. Gram stain of the exudate shows numerous neutrophils, many that contain intracellular gram-negative diplococci. He has had three similar episodes of urethritis over the past 2 years. Which of the following properties of the infecting organism best explains the reinfection?
Options
- AAntigenic variation
- BCatalase
- CInhibition of B-lymphocyte function
- DInhibition of T-lymphocyte function
- EPolysaccharide capsule
How the community answered
(17 responses)- A71% (12)
- B12% (2)
- C12% (2)
- E6% (1)
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