Acinetobacter baumannii has which characteristic?

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Multiple Choice

Acinetobacter baumannii has which characteristic?

Explanation:
Acinetobacter baumannii is oxidase negative, meaning it lacks the enzyme cytochrome c oxidase and gives a negative oxidase test. This negative result helps distinguish it from oxidase-positive organisms like Pseudomonas. It is a nonfermenter that can grow on MacConkey agar as pale, non-lactose-fermenting colonies, so the statement about not growing on MacConkey is incorrect. It does not ferment glucose, which fits its nonfermenter status, and cysteine isn’t a defining requirement. The oxidase-negative trait is the most characteristic feature distinguishing this organism.

Acinetobacter baumannii is oxidase negative, meaning it lacks the enzyme cytochrome c oxidase and gives a negative oxidase test. This negative result helps distinguish it from oxidase-positive organisms like Pseudomonas. It is a nonfermenter that can grow on MacConkey agar as pale, non-lactose-fermenting colonies, so the statement about not growing on MacConkey is incorrect. It does not ferment glucose, which fits its nonfermenter status, and cysteine isn’t a defining requirement. The oxidase-negative trait is the most characteristic feature distinguishing this organism.

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