Multiple Choice
Why did it take so long to understand that L. pneumophila is the cause of a respiratory tract infection?
A) It stains poorly and is difficult to detect.
B) It has fastidious growth requirements and is difficult to culture.
C) It is extremely rare in nature and is seldom present in a population.
D) It has fastidious growth requirements and is difficult to culture AND it stains poorly and is difficult to detect.
E) It is extremely small and can only be detected using electron microscopy AND it is extremely rare in nature and is seldom present in a population.
Correct Answer:

Verified
Correct Answer:
Verified
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