USMLE Step 1 Question of the Day!

A 43 year old man comes to the ER complaining of severe headache, fever, and neck pain. During his history you learn that he is HIV positive. You perform a lumbar puncture. What stain should you request given this man's symptoms and history?

A) Ziehl Neelsen
B) India ink
C) PAS
D) Giemsa
E) Congo Red

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answer: B) India ink. Given this man's immunocompromised state, you need to check for opportunistic infections such as cryptococcus. Cryptococcus stains with India ink.



Drug of Choice for

Enterobius vermicularis


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answer: Mebendazole