Which of the following describes Acinetobacter baumannii complex?

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Multiple Choice

Which of the following describes Acinetobacter baumannii complex?

Explanation:
Acinetobacter baumannii complex are Gram-negative, non-motile, oxidase-negative, non-fermenting bacilli that often show up as hospital-acquired pathogens and can grow on MacConkey agar. The statement about growing on MacConkey is correct because MacConkey supports the growth of Gram-negative bacteria, and Acinetobacter does not ferment lactose, so colonies appear colorless rather than pink, but growth is evident. The other statements don’t fit: they are not motile, they are oxidase negative, and they are usually resistant—not sensitive—to penicillin.

Acinetobacter baumannii complex are Gram-negative, non-motile, oxidase-negative, non-fermenting bacilli that often show up as hospital-acquired pathogens and can grow on MacConkey agar. The statement about growing on MacConkey is correct because MacConkey supports the growth of Gram-negative bacteria, and Acinetobacter does not ferment lactose, so colonies appear colorless rather than pink, but growth is evident.

The other statements don’t fit: they are not motile, they are oxidase negative, and they are usually resistant—not sensitive—to penicillin.

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