A 3-Month-Old Boy Is Brought to the Emergency Department Due

A 3-month-old boy is brought to the emergency department due to 2 days of fever and irritation that progressed to lethargy.  Temperature is 38.6 C (101.5 F) .  A lumbar puncture is performed, and the results of cerebrospinal fluid (CSF) analysis are as follows: Gram-negative coccobacilli are isolated from the CSF.  These organisms demonstrate little growth on 5% sheep blood agar but grow well when incubated on the same media alongside colonies of Staphylococcus aureus.  Staphylococci promote the growth of these bacteria by supplementing which of the following substances?

A) ATP
B) Catalase
C) Iron
D) Lactose
E) NAD+
F) Pyruvate

Correct Answer:

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