Identification of the causative microbe for a diarrheal infection often requires a stool culture. The best medium for this purpose is
A. a medium containing mammalian blood to provide extra growth factors.
B. a liquid medium, as the diarrhea conditions are more liquid than solid.
C. a medium containing bile as a selective agent.
D. a medium containing a broad-spectrum antibiotic as a selective agent.
E. a general purpose medium that supports the growth of the diverse gut microbiota.
Answer: C
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