WBR0051

Author	PageAuthor::William J Gibson
Exam Type	ExamType::USMLE Step 1
Main Category	MainCategory::Microbiology
Sub Category	SubCategory::Genitourinary, SubCategory::General Principles, SubCategory::Infectious Disease
Prompt	[[Prompt::A 22 year old woman presents to her primary care physician complaining of dysuria for the past 3 days with mild discharge. Her last unprotected sexual encounter was 2 weeks ago. Gram stain of the urethral swab reveals Gram-Negative diplococci. Which of the following media could be used to isolate this organism?]]
Answer A	AnswerA::Thayer-Martin
Answer A Explanation	AnswerAExp::Correct - See explanation
Answer B	AnswerB::Maconkey’s Agar
Answer B Explanation	AnswerBExp::Incorrect - Maconkey’s agar is used to culture a variety of organisms. Lactose-fermenting enterics (eg E.Coli) will appear as pink colonies.
Answer C	AnswerC::Tellurite Agar
Answer C Explanation	AnswerCExp::Incorrect - Tellurite agar can be use to culture Corynebacterium Diptheria.
Answer D	AnswerD::Bordet-Genou Agar
Answer D Explanation	AnswerDExp::Incorrect - Bordet-Genou agar is used to culture Bordetella Pertussis.
Answer E	AnswerE::Sabouraud’s
Answer E Explanation	AnswerEExp::Incorrect - Sabouraud’s agar is used to culture fungi.
Right Answer	RightAnswer::A
Explanation	[[Explanation::The patient in this vignette has been infected with Neisseria Gonnorhea, a gram negative diplococcus. Neisseria Gonnorhea can be cultured with Thayer-Martin media. Educational Objective: References: ]]
Approved	Approved::Yes
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