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USMLE · Question #499
USMLE Question #499: Real Exam Question with Answer & Explanation
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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
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