A gram negative rod from a ventilator-associated pneumonia is oxidase positive, does not ferment lactose, and …

Question

A gram negative rod from a ventilator-associated pneumonia is oxidase positive, does not ferment lactose, and produces a green pigment with a grape-like odor. Which organism is most likely?

Accepted Answer

보기 3: Pseudomonas aeruginosa

A positive oxidase reaction already excludes the Enterobacteriaceae. Adding green pigment and the characteristic odor identifies Pseudomonas aeruginosa. Acinetobacter is oxidase negative and differs in morphology and growth characteristics.

Answer

보기 1: Acinetobacter baumannii

Answer

보기 2: Stenotrophomonas maltophilia

Answer

보기 4: Klebsiella pneumoniae

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A gram negative rod from a ventilator-associated pneumonia is oxidase positive, does not ferment lactose, and produces a green pigment with a grape-like odor. Which organism is most likely?

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