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A Gram-Negative Bacillus That Is Hydrogen Sulfide (H₂S)-Positive, Citrate-Positive, Spot

Question 1

Multiple Choice

A gram-negative bacillus that is hydrogen sulfide (H₂S) -positive, citrate-positive, spot indole-negative, and associated with gastroenteritis in the United States is most likely:


A) Klebsiella pneumoniae.
B) Proteus vulgaris.
C) Salmonella enteritidis.
D) Shigella sonnei.

Correct Answer:

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