A 44-Year-Old Man Is Brought to the Emergency Department by His

A 44-year-old man is brought to the emergency department by his wife because of confusion that began a few hours ago.  Earlier in the day, he complained of a severe headache and nausea.  On physical examination, his temperature is 38.3 C (101 F) and nuchal rigidity is present.  Lumbar puncture and cerebrospinal fluid (CSF) examination show: Gram stain of the CSF would most likely reveal which of the following?

A) Bean-shaped, Gram-negative cocci in pairs
B) Lancet-shaped, Gram-positive cocci in pairs
C) Gram-positive cocci in clusters
D) Non-motile Gram-negative coccobacilli
E) Motile Gram-positive rods

Correct Answer:

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